New Style Smart Hearing Aids Rechargeable Mini BTE Hearing Aid Intelligent APP Control Adjustable Sound Amplifier for Deaf Elder

Function description 130nm full digital signal processing chip 4-channel automatic volume control (WDR) BLE wireless bluetooth control supercardioid pickup Dual microphone Medium power output, low distortion Adaptive feedback cancellation Layered noise reduction Auto save volume and mode Volume change beep One-button multi-function boot delay prompt tone 3 program modes: turn on when out of the box, turn off when in the box Mode switching beep Magnetic charging Volume change beep Low battery warning light Technical data Maximum output (OSPL90): 107+3dB Average output (HAF OSPL90): 104±3dB Maximum gain (FOG50): 31+4dB Average gain (FHA Avg): 28±4dB Equivalent input noise: ≤30dB Bandwidth range: F1≤500Hz F2≥4000Hz Distortion (500, 800, 1600)≤3% Rated current consumption: NA

Packing list: Principal machine * 2 Earplugs * 3 Cleaning sweeper * 1 Warranty card * 1 User manual in English * 1 USB Cable* 1 Charger*1 Note ：

That is normally situation that hearing aid make whistle noise . About noise , you can do this steps to remove it .

-Adjust volume to the minimum before wearing. -Choose an earplug of slightly bigger size to avoid whistler. -Increase volume gradually to avoid sudden increase in sound. -If you hear a howling,check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage.