OTE Digital Hearing Aids - Push Button Volume Control. Condition is New. Shipped with USPS First Class Package. *Price is for one device, tube, cleaning tool, ear tips, and box. 100% Digital processing for exceptional sound quality 2 channels WDRC amplifier 12 bands frequency shaping Low level expansion Low battery warning Open-fit design,easy operating Rocker volume control Memory switch tone Low frequency cut setting MPO setting Output Compression Limiting(AGC-O) Low current consumption Housing Design:..........Openfit ProcessingDigital:.......2ch Volume control:..........Rocker-type II Switch & Trimmer:........Rocker-type II Peak OSPL90(dB SPL):.....117 OSPL90-HFA(dB SPL):......108 Peak Gain(dB):...........30 HFA/FOG(dB):.............20 Reference test gain(dB): 26 Frequency Range(Hz):.....250-5000 EQ input noise(dB):......30 Battery Size:............13A Battery Current(mA):.....0.86