It is best to connect the magnetic suction line when not in use, as it can extend the service life SA01 is a non-programmable instantfit ITE hearing aid. Based on integrated signal processing, SA01 can provide your hearing clear and comfortable. No matter you are in quiet, noisy, outdoor environment, it will keep you hearing clearly. This is a hearing aid that uses magnetic charging.The unique charging method brings you more convenience. People can control the volume and voice output as they like so that they can hear comfortably. Our Hearing amplifier is a great option if you're looking for an efficient and effective solution. 1.Magnetic Charging : Its magnetized design can hold the hearing aid firmly in place when it is charging, it can be used for 26 hours after charging for 4.5 hours. It is easy to carry and can be put into a pocket. The hearing aid is turned off when charging, the two lights are on when charging, and only one light is on when the hearing aid is fully charged. 2.Smart And High Quality: Advanced digital signal processing technology can intelligently reduce environmental noise and provide clear, high-quality natural sound. NOTE: This Sound Amplifier is suitable for people with mild to moderate hearing loss. 3.Lightweight And Comfortable: This hearing aid is small in size, convenient and comfortable to wear. The volume can be adjusted by Knob, the right ear increases the volume clockwise, the left ear increases the volume counterclockwise, with low and medium power, suitable for patients with mild to moderate hearing loss. It is an ideal hearing companion for people with hearing impairment who listen to music, talk or watch. 4.A Variety Of Accessories: There are 3 pairs of soft earplugs included (S/M/L) for various ear size, ensure hearing aids stay comfortably firm in place. Please use the correct wearing method to ensure that the earplugs closely match the ear canal to avoid sound feedback and howling. 9 Earplugs,1 cleaning brush, 1 wax guard and tool, 1 manual, 1 USB charging cable.