1 Pair Digital Hearing Aids Sound Voice Amplifier Product Information Super mini size and light weight, easy and comfortable to wear Silicone ear pads in 3 different sizes , suitable for any form of ear Convenient wear Volume Adjustable Low noise, low distortion; Anti-shock, anti-drop, moisture proof, high temperature proof Help people with hearing impairment to hear sound and voice Battery Type: button battery (included) Kindly Note: 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 (silicagel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage. Please regularly clean the ear plugs or ear molds in order to ensure the normal use of hearing aids. Use for long periods of time, please remove the batteries to prevent battery rot erosion hearing aid components. Package Includes: 2 * Hearing aids(a pair) 3 * Earplugs 1 * Instruction