This is the wireless bluetooth handset that makes it easier to hear smartphone calls by clarifying dialogue and amplifying sound. The device lets users select the tones they hear best and enhances the frequencies they struggle to hear, providing up to 40 dB of amplification and making a caller’s voice up to 100X louder. A digital processor filters out distortion and static, and the optional T-coil mode broadcasts sound directly through a compatible hearing aid. Lightweight and portable, the amplifier pairs with any Bluetooth-enabled smartphone from up to 33' away, and it frees users from the tangling cables or cumbersome neck straps found with many amplifiers. With speakerphone mode and visor clip for hands-free calls while driving. The lithium-ion battery provides up to 10 hours of talk time from a four-hour charge with the included AC adapter. 5 1/2" H x 2" W x 1 1/3" D. (3 oz.)