No need to insert the ear, no damage to hearing, better effect,Suitable for patients with mild, moderate, and severe hearing loss. Hearing aids, Bluetooth, music, all are indispensable. Widely used and easy to use, just to restore the most. Active Noise-Cancellation: Yes, Enjoy crystal-clear sound with active noise-cancellation, perfect for noisy environments. Vocalism Principle: Dynamic,Dynamic vocalism principle delivers rich, balanced audio for an immersive listening experience. Bluetooth Version: 5.3,Experience stable, low-latency audio with the latest Bluetooth 5.3 technology. Weight[g]:300 Battery life up to[hours]:15 Maximum wireless range[m]:10m-20m Sound Isolating:YES Category:Earphones and Headphones Charging Method:cable Bluetooth Version:5.3 Function:For Hearing Aid Colour:B: Material:ABS Package Contents: 1set x sound amplifier 1 x Chinese and English instruction manual 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.