Bluetooth-enabled streamers are assisted listening devices that have greatly elevated the hearing aid wearing experience. It’s an example of using today’s wireless hearing aid technology in a smart way that truly provides convenience for the individual with hearing loss. Adjustable volume control with a Max sound output of I30 +- 5dB. Sound Gain : 50dB Total Harmonic Wave distortion Less than 4% Frequency range = 100 – 6000Hz Input Noise: less than 25dB Voltage: DC 1.5V / Current: less than 5mA Battery size: AG13