Wireless Bluetooth Connectivity :Enjoy the freedom of wireless connectivity with this headset that connects to your device via Bluetooth. Active Noise-Cancellation :Block out unwanted noise and distractions with the active noise-cancellation feature of this headset. 3D 5.0 Sound Quality :Experience high-quality sound with the 3D 5.0 technology that delivers clear and crisp audio. Breathable Design :Stay comfortable during long listening sessions with the breathable design of this headset. Blue/Red LED indicating. Transmission distance: 10 Meter. Bluetooth type : Bluetooth 5.0 + . Frequency Response: 20HZ-20KHZ USB: micro-USB. Power: 180MAH lithium rechargeable battery. Play time : 8-10hours Suits for both Men&Women. colour:Blue&Green material: Fabric Package Contents: 1 x Music Sleep Mask Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.