OTE Digital Hearing Aids - Push Button Volume Control. Condition is New. Shipped with USPS First Class Package. - Digital processing 4 Preset Configurations: - 4 channels WDRC amplifier - Speech (default) - Apaptive feedback cancellation - Restaurant Noise - Open-fit design, easy operation - Low battery warning - Low power consumption - Direction Micphone - High quality 20-bit audio processing - 2/4/6 channels are optional - Bluetooth and programming are optional Technical DataEggo:........402 Peak OSPL 90 ( dB SPL): 110 HAF OSPL 90 ( dB SPL): 105 Peak Gain( dB ):................30 HAF Ful on Gain ( dB ):...20 500Hz(%):.........................0.1 800Hz(%):.........................0.2 1600Hz (%):......................0.3 EQ Input Noise ( dB ):......22