If the amplifier is not working normally. 1. Make sure it is turned to the ON position. 2. When using Zinc Air batteries, the adhesive tab must be taken off and the battery must be sat for a full minute before first use. 3. Check that whether the Battery Compartment is completely closed. 4. Increase the volume slowly to a suitable volume. 5. Make sure the battery is properly inserted. If the amplifier is still not working, please change a new Battery.
If the amplifier works, but the volume is too low or too loud. 1.You could adjust the volume. If you find it too loud, press the volume button to lower the volume. If the sound is too low, increase the volume. 2. If it doesn\'t work, try to switch to other listening mode. 3. If the sound is still too low, you could change a new battery. 4. If the sound is still too loud, check the earpiece for blockage or make sure the earpiece is clean and inserted securely. 5. Your hearing may be too sensitive to use the amplifier. You could contact us and we would arrange a return and refund.
There is a whistling sound. 1. Decrease to the lowest volume and start at the lowest volume. Increase volume one click at a time until you feel most comfortable. 2. Make sure the earpiece is clean and inserted properly.
There is a disconcerting noise in the background. 1. Make sure you are gradually accustomed to the amplifier by slowly raising its volume and gradually increasing the usage time. It is important to get used to both sounds you are focusing on the background noise as well. 2. Adjust to the suitable mode and volume settings. If the sound is still disconcerting, you may be too sensitive for the amplifier. You may contact us and arrange a return and refund.