NOTE: This item comes with / adapter, please confirm the voltage . Description This hearing amplifiers is a great solution for those who are suffering bad hearing condition or hearing loss. Professiuonal audiological theoretically designed with digital sound noise reduction processing, this ear device actively reduces background noise to provide great hearing to the maximum. With handy working mode button and volume control button, the user accurate adjustments in no time. A wonderful choice for the hard-of-hearing people, the deaf, the elderly, the hearing-impaired, etc. Features - Pocket design: Clamp design allows you to clamp the to your pocket or your collar. - Sound and voice amplifier: Designed by expert audiologists with professional sound noise reduction process, this can help the user hear the outside sound more clearly and . Help the user the pleasure of listening to nature's sounds or talking to others. - On/Off , adjustable volume control, working mode . You can adjust the volume from the minimum to the maximum. "N" is for normal work mode. "H" can help you reduce low frequency noise, getting clearer sound. - Comfortable wearing: silicone ear buds won't hurt your ears, offering the most comfortable wearing . - Wide usages. For hard-of-hearing users, the deaf, the elderly, the hearing-impaired, etc. - present box. 4 different sized earplugs can fit most of people's ears. Delicate box is included for and portable use. Specifications - - Material: ABS, silicone - Item Size: 6.50X9.00X3.00cm/2.55X3.54X1.18in - Type: Pocket Rechargeable - Output: 129±4 - : 50 ± - Distortion: <=5% - Frequency Range: 450~3500Hz - Input Noise: <=30 - Voltage: AC220V - Battery: Rechargeable Battery - Working Voltage: 3.7V - Working : <=3mA Note: - Adjust volume to the minimum before wearing, and increase volume gradually to avoid sudden increase in sound. - Choose an earplug of slightly bigger size to avoid - 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 is tight, the appropriate choice of earplugs and plugged, make sure no air leakage - Keep the ear clean - Remove the battery if you don't use it for long time Package list: 1 x with Earphone 1 x Charger (220V) 4 x Earplugs 1 x User Manual