[Mfg Direct Sale!! No Resellers,Save up to $100!!] Automatic Gain Control: Automatically adjust amplifier level base on loudness of sound to protect your hearing.
Re-chargeable: Built-in rechargeable battery can offer 120 hours of continuous use each charge.
Directional Noise Canceling Mic: Compared to omnidirectional microphone,the directional microphone will emphasize on amplification for sound from the pointed direction,thus the sounds from other direction will be less amplified or canceled to reduce background noise
Pocket Size: handy and easy to operate, works as alternative of hearing aid
Quality Guarantee: Two years manufacturer quality guarantee and life time repair service