4 Band Signal Repeater GSM 2G 900 1900 3G WCDMA 850 2100 4G LTE B28 700 800 AWS 1800 2600 Cellular Amplifier Booster Antenna Kit
ID: 58033

4 Band Signal Repeater GSM 2G 900 1900 3G WCDMA 850 2100 4G LTE B28 700 800 AWS 1800 2600 Cellular Amplifier Booster Antenna Kit

5.0 (1 votes) | 1 orders
Price: US $774.84 - 855.44 / piece
Discount Price:
US $ 407.96 - 450.39 / piece
Ships From

Hot Sale 4-band signal booster set, 70dB high gain, more powerful, with AGC function. Shipping from Spanish warehouse & Russian warehouse, fast delivery. Click below picture to purchase:

Lintratek 2020 New Arrival 4-band signal booster—Cover almost all signal bands in the world !!!

For 2g 3g 4g signal amplify.
#Please check your phone signal before purchase as below ways,

-1.Apple system: call : *3001#12345#* , signal strength will show on the top left corner.

Samsung system : call : *#0011#

-2.Or you can download "Network Cell Info" or "LTE Discovery" app to check .

Put your phone outside your house to check its signal strengthness :

Android : setting, about phone, status, network ,dbm display shall be at -70dbm to -85dbm around ;
IOS : dial *3001#12345#*, dbm display shall be at -70dbm to -85dbm around ;

Important Note:

This link has 6 options: (Please read it carefully or contact us.)

*Option 1: 800+900+1800+2100mhz (B20+GSM+B3+B1)

Frequency range:
Uplink: 832~862mhz /890-915mhz /1710-1785mhz /1920-1980mhz
Downlink: 791~821mhz /935-960mhz /1805-1880mhz /2110-2170mhz

*Option 2: 850+900+1800+2100mhz (B5+GSM+B3+B1)

Frequency range:
Uplink: 824~849mhz /890-915mhz /1710-1785mhz /1920-1980mhz
Downlink: 869~894mhz /935-960mhz /1805-1880mhz /2110-2170mhz

*Option 3: 2600+900+1800+2100mhz (B7+GSM+B3+B1)

Frequency range:
Uplink: 2500-2570mhz /890-915mhz /1710-1785mhz /1920-1980mhz
Downlink: 2620-2690mhz /935-960mhz /1805-1880mhz /2110-2170mhz

*Option 4: 700+850+1900+1700/2100mhz (B28+B5+B2+B4)

Frequency range:
Uplink: 703-748mhz /824-849mhz /1850-1910mhz /1710-1755mhz
Downlink: 758-803mhz /869-894mhz /1930-1990mhz /2110-2155mhz

*Option 5: 2600+850+1900+1700/2100mhz (B7+B5+B2+B4)

Frequency range:
Uplink: 2500-2570mhz /824-849mhz /1850-1910mhz /1710-1755mhz
Downlink: 2620-2690mhz /869-894mhz /1930-1990mhz /2110-2155mhz

*Option 6: 700+850+1900+1700/2100mhz (B12/B17+B5+B2+B4)

Frequency range:
Uplink: 699-716mhz /824-849mhz /1850-1910mhz /1710-1755mhz
Downlink: 729-746mhz /869-894mhz /1930-1990mhz /2110-2155mhz

One device, solve all signal problems. - 4 Band KW20L

1* 4-band booster = 4* Single-band boosters !!!

No worry to choose different signal boosters for variety of signal frequencies. This 4 band booster is definitely the best choice for you!

Product information

Model : KW20L-CGDW/GDWL/LCPA (Label type: KW27A)

Gain Control + ALC
N Female Connector
LTE 700 800 2600 CDMA 850 GSM 900 AWS 1700/2100 DCS 1800 PCS 1900 WCDMA 2100mhz

NOTE: This one is 70dB High Gain !!!

Selling point:

1.Lintratek genuine 4 band, quality guaranteed, 1 Year guarantee. 2G 3G 4G LTE signal booster, can cover almost all of signal frequencies used in all over the world, Russia, Europe, Asia, South & North America, Australia.

2.New starry sky patented design in 2020, different appearance from normal device. Strip design on the back for better dissipation.

3.Four LED screen displays, shows real-time signal, let you know everything more detailed and clearer.

4.ALC/AGC function, use 2020 upgrade V7.0 version chip, low interference to BTS.

5.Compact size, low consumption, easy to install on wall, great coverage.

6.Coverage: cover about 300-1000sqm without any barriers, but one antenna mostly can cover 300 square meters. This repeater can work with 1-4 indoor antennas.

7.70dB high gain, 20dBm large output power, can go through the barriers easier.

8.Expand signal coverage where signal is weak, suitable for home use, no more bad reception, no more dropping calls.

9.ROHS / CE / ISO certification.

Well-Designed LED Display

Different from display screen of other booster,
1.It shows not only signal strength, but also output power.
2.The signal strength is displayed not only in graphic, but also in digit, which makes everything more detailed and clearer.

Improve Voice signal & Internet data of multiple operators

No need to worry about signal frequency anymore. This 4 band booster can cover almost all of signal frequencies used in Russia, Europe and Asia.

Good Heat Dissipation

No heat problem. The strip design on the back leaves space between booster and walls, which will help dissipate heat well, so as to prevent heating problem.

2020 New Upgrade V7.0 AGC Chip

Equipped with automatic gain control feature, makes no interference to base station. Feel free to use!

70dB High Gain & Large Coverage

Able to connect 3-5 indoor antennas at the same time, and cover up to 800 square meters without any barries.

Applicable Places

This 4 band booster can work for variety of places, such as office, shopping mall, home, basement, etc. Wherever you need to improve the signal, our products will help.

Low Radiation & Healthy Life

Signal repeater is helpful and no harm to our body. When the signal is stronger, the radiation is lower.

Packaging Including:

1. 4 band Signal Booster x 1

2. AC Power Cord + Instruction manual x 1

3. External 8-units yagi antenna x 1

4. Internal panel antenna x 2

5. 2-ways splitter x 1

6. 1m cable x 1

7. 5m cable x 1

8. 15m cable x 1

Product Details:


#External 8-units yagi antenna

12dBi Gain

Frequency: 698-2700mhz

N female connector

Advantage: Waterproof

#Internal panel antenna with 2m cable

9dBi Gain

Frequency: 700-2700mhz

N male connector

#Internal panel antenna with 0.3m cable

9dBi Gain

Frequency: 700-2700mhz

N female connector

#2-ways microstrip splitter

Frequency: 700-2700mhz

N female connector

#3pcs Cable: 1m + 5m + 15m

RG6 5D coaxial

N male connectors

Working principle:

1.Outdoor antenna received the signal from signal tower.

2.Then, through cable sent the signal to the indoor repeater.

3.The repeater accepts and improves the signal.

4.After that, the fine signal goes into indoor antenna, via cable to your mobile phone.

How to install:

Step 1
Search a position where can receive good signal(stronger than -70dB). Parallelly installing the outdoor antenna on that location, towards to the base station or cell tower.

Step 2
Connect outdoor antenna to repeater machine ''BTS" port via cable, indoor antenna to ''MS" port. Please ensure all were tightened joints, connected well.

Step 3
After finished all parts then check whether all connection is well, now you can turn on the power and check your mobile phone signal strength.

Note: You should put outdoor antenna far away from indoor antenna. They should be separated by walls or barriers.


Lintratek Shipping Terms:

Items are only shipped after payment confirmed.(normally 2 days)

1.After verificating the payment, we will send the items within 48-72 hours except holiday.

2.We just ship to the correctly address depending on the Cntronic you registering, when your place an order please write down your matching address. If you want to change address, please contact us before shipment.

3.Please note that delivery time is estimated. If you do not receive your goods beyond estimated delivery time, please contact us before open dispute, we will check and solve the probem for you.

4.All goods from ours are checked before shipping. They will be packed very well to make sure they are in good condition when you get the goods.

5.When you choose UPS, FEDEX and DHL, Remote Area Fee may occur if your address is in remote area.

Lintratek Service:

1.We accept escrow and banking transfer.

2.We accept refund if there is quality problem(sent us the picture to evidence the problem), but need to return the goods with the original package, and the buyer need to pay for the back and forth freight.

3.Our product can boost the fine indoor signal, only if your outdoor signal is perfect, Please make sure Your side outdoor signal is good, if not, our device can not expand anything you expect.

4.Regarding to the PI declare value, we can write the value as your requirement to help your side customs clearance.

Buyer Duty:

1.Provide us your correct contact information.

2.Customs clearance and pay for it.


1.If you satisfy and love our product, please leave 5-STAR positive feedback to encourage us keep on !

2.Feedback is important to us, we request that you can contact us before you give the neutral or negative feedback, We will handle with a pleased way, that makes double win between you and us.

  • Gain(dB): 70dB
  • Model Number: KW20L / KW27A
  • Brand Name: lintratek
  • Origin: Mainland China
  • Certification: CE
  • Working System: LTE 700 800 2600 CDMA GSM DCS WCDMA AWS PCS
  • Frequency Band: B28 B12/17 B20 B7 B5 B8 B3 B1 B4 B2
  • Output Power: 20dBm
  • Power Supply: AC 100~240V, 50/60Hz; DC 5V 3A
  • Coverage: 300-1000sqm without any barries
  • Feature: LCD Display; 4 band Repeater
  • Type: Full kit; easy wall installation
  • External Antenna: 12dbi 8-units yagi antenna, N-female connector
  • Internal Antenna: 9dbi panel antenna*2, N-male/N-female connector
  • Divider: 2-ways microstrip splitter
  • Cable: 3pcs: 1/5/15 meters, RG6 5D coaxial, 50 ohm
  • Option 1: B20 800+900+1800+2100mhz
  • Option 2: B5 850+900+1800+2100mhz
  • Option 3: B7 2600+900+1800+2100mhz
  • Option 4: B28 700+850+1900+1700/2100mhz
  • Option 5: B7 2600+850+1900+1700/2100mhz
  • Option 6: B12/B17 700+850+1900+1700/2100mhz
  • Suitable Area: All over the world(Russia,Spain,Brazil,United States,Canada,Ukraine..)


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some location we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:

Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.

If you did not receive the product within the guaranteed time(60 days not including 2-5 day processing) you can request a refund or a reshipment.

If you received the wrong item you can request a refund or a reshipment.

If you do not want the product you’ve receive you may request a refund but you must return the item at your expense and the item must be unused.

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of CNTRONIC Consumer Electronics Retailer (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of cntronic.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (60 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.



Thank you for your interest doing business with us!

If you would like to get a discounted price for your large purchase orders, fill in the required blanks along with your email address, the product Item ID # and/or the link of the item that you want to order, item quantity (minimum of 30 pieces), shipping country and payment method is required. We will contact you with a discounted price as soon as we receive your inquiry.

You may also like these products