analogue BTE hearing aid - "Ultra sharp" Push-Pull circuitry rich low frequency with loud comfortable sound. Analogue BTE Hearing Aid - " Ultra sharp" has features as following:Large Scale Push Pull (PP) circuitHI-FI Super Power Output specially designed for Mild to Profound hearing lossLoud and Comfortable sound with Rich Low Frequency Ergonomically designed for Comfort and Optimum ClarityUltra- ...