Brand Name : ravi
Control Button : Yes
Active Noise-Cancellation : Yes
Style : True Wireless
Wireless Type : Bluetooth
Connectors : None
Communication : Wireless
Vocalism Principle : Dynamic
Volume Control : Yes
Frequency Response Range : 20-20000Hz
Function : For Internet Bar
Function : Monitor Headphone
Function : for Video Game
Function : Common Headphone
Function : For Mobile Phone
Function : For iPod
Function : HiFi Headphone
Function : Sport
Sensitivity : 120±3dB
Is wireless : Yes
Plug Type : Wireless
Codecs : Apt-X HD
Support Memory Card : No
With Microphone : Yes
Model Number : TWS4
Resistance : 32Ω
Waterproof : Yes
Line Length : None
Support APP : Yes
compatible : All phone and tablet
compatible 2 : for android and ios system
working time : 3-4 hours
working range : About 10M
Headset battery capacity : 50mAH
waterproof : IPX4 waterproof

If you are unsatisfied with your item for any reason, return it within 30 days of delivery.