Alead Nolan HearLinks Wireless Voice Audio Links, a Bluetooth earphone, music streaming, personal sound amplifier and T-coil receiver 4 in 1. With volume, L/R balance adjustment to hear better As a personal voice amplifier with embedded microphone and volume, L/R balance adjustment to create a superior and amplification of sound at difficult listening situations such as conversation, meetings, dinner, family gathering, watching TV, movies..etc. with T-coil receiver feature to listen crystal clear movie, music, or speaker audio in public venues fitted with loop systems such as concert halls, theaters, and churches (marked with a T symbol as shown). Connect to Bluetooth mobile phone to answer incoming call easily. Support multiple links to connect Bluetooth phone and music streamer at a time with A2DP, AVRCP and HST, HF profile supporting. As a Bluetooth audio streaming receiver to connect to your Bluetooth audio/voice transmitter such as Alead LiveMIC, BTMIC, TRX_HD, TX to listen and enjoy music/audio over distance. Binaural design with comfortable stereo earphone offer higher volume and excellent sound quality and isolation from ambient noise. L/R Balance control set the balance between the left and right ear to compensate for a more volume in one ear. Volume control to adjust own preferred volume. The instant mute to stop unwanted voice sent to receiver. Have better sound for one-to-one conversations, watching TV, movies, listening to music, family gatherings, dinner, class room, meetings, seminars, restaurant, theater, concert hall, church, doctor, pharmacy, in the car. The lightweight, unobtrusive and easy-to-wear with clip or lanyard offer enhanced mobility to put in pocket, clip on collar, loop around on neck or place on table for conveniently using. Operate on either USB power supply directly or internal rechargeable battery to give users plenty of time and choice to use conveniently.