Product performance description

Bone Conduction Sunglasses Open Ear Headphones Built-in Blue-tooth to work with your smart phones, computers and mac computers; Built-in bone conduction transducer on both legs, you don't need to wear headset or earphones, and you still can hear music and take a phone call, it is a totally new experience. Wearing Bone Conduction Sunglasses While jogging allows you to hear the dangers in your environment while still listening to audio or talking on the phone. Wearing Bone Conduction Sunglasses while riding allows you to hear GPS instructions and take phone call while watching the traffic on the road. Talk on the phone in the noisiest of environments even with your ears covered. Enjoy your favorite sports without missing a call.

Anti-blue lens

Black lens

Blue lens

Yellow lens

Customer service:  

 Working time:
Monday to Friday 9:00-18:30 and Saturdays 9:00-12:00 (Beijing time). Except holidays!

We are always glad to help you:
We test all the products carefully before we send.
But If you still have any problem our doubt don’t hesitate to contact us!!
We will do our best to solve your problem.

*** We want to help our customers***
But if buyer open dispute or leave negative feedback without contact us in advance, we will not provide after sales service, and buyers will be put in the black list.
For scammers we will provide all the proofs and report them to Cntronic, which will result in buyer's suspended or terminated account.

  Payment:  
1- Payments must be made within 7 days after placing the order, otherwise the order will be invalid or canceled by system.
2-Usually Cntronic takes 24 hours to check and confirm the payments.
3-If the payment is not available or invalid, your order will be closed by system.

  Shipping:  
1- All the products will be tested, pack and ship out in 2-4 working days, after the payment is confirmed.
2- All the tracking numbers take few days to appear online after handling time.
Later they can be track in : www.17track.net
3- International shipping usually takes 25-60 days. Many facts such as bad weather, custom or sales hot season etc, can cause delay.
If your package is taking too long to be delivered.
Please contact us and we will help you check what happened with your package.
4- Make sure you have completed all the detail information correctly:
Contact person (Full name for Russians), address, post code and telephone. 
We will prepare the package with the information provided in the order.
Buyers are responsible for undelivered packages if any of the information provided was wrong.
5- Packages cannot be send for a different address than the address in the order. We cannot change the address information.

  Custom, Tax and Duties:  
1- All the countries have different rules, please make sure the product don’t have any restrictions in your country before purchase it. Buyers are responsible if the product is returned or hold by buyers custom for restrictions reasons.
2- If the product need any special document in your country or need to be describe by a certain value, please require in it advance. Documents such as invoice etc, will not be send with the package unless it was required by the buyer.
3- Product price doesn’t include import taxes or any additional fee. Buyer is responsible for clear custom and pay the fee if it is charged by the buyer’s country.
But we can help buyers providing product invoice or any other document and information buyers need to clear the custom, so please don’t hesitate to contact us. 

  Cancellation and refund:  
1- Orders can only be canceled before the package is handle to shipping company.
2- Once the product is already sent, the order cannot be canceled anymore.
3- For canceled orders and refunds Cntronic usually takes 1-2 weeks to make the refund the buyer.
The time will depend in what kind of payment you chose to pay.
You can check the refund time in the following link.