Description [Easy to use] It is perfect for the elderly, children, disabled, pregnant women or patients in urgent need of help. They only need to provide timely and thoughtful care . It can also be used at the door. It is widely used in homes, hospitals, communities, restaurants, offices, etc. [Easy to use] Plug the receiver into the power outlet anytime and anywhere, and the waterproof transmitter can be worn as a pendant or as a bedside. Energy to benefit from a long delay. [52 kinds of prompt tone options] 52 kinds of prompt tones are available for selection. Designed with flashing LED warning lights. The volume is adjustable in 4 levels, the maximum is 110db for the elderly. , Because important emergency calls can be missed. [Long Range] It can measure up to 80 meters in an open area (walls and other objects will reduce the distance), without interference from other devices, and can be used almost anywhere in the house . [Low battery indication] 1. If the transmitter does not work, but the LED indicator of the transmitter keeps flashing, it means the battery is low, please replace the battery; 2. The coupling between the transmitter and the receiver is the touch after replacing the battery.Point, the element is not set, just manually pair it to fix it. Product description functionality: white Shielded power supply: 90-220V Range: 80m Pairing instructions: 1. Press the button on the receiver until the indicator lights up; 2. Press the call button once to establish a link with the recipient. 3. The blue light flashes to confirm that the pairing is successful; 4. The receiver will automatically exit pairing mode; 5. The system is ready. Package included: 1 transmitter 1 receiver Error correction: 1. There is no operation, but the transmitter light keeps flashing, indicating the battery is low, please replace the battery; 2. After replacing the battery, the coupling between the transmitter and the receiver may lose contact, the element is not defined, it is enough to pair manually to repair.