[Easy to use] It is ideal for the elderly, children, disabled, pregnant women or patients who need urgent help. 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 enjoy a long delay time. [52 kinds of prompt tone options] 52 kinds of prompt tone 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 may 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 with other devices, and can be used almost anywhere in the house. [Low battery indication] 1. If the transmitter is not working, but the LED indicator on the transmitter keeps flashing, it means the battery is low, please replace the battery; 2. The pairing between transmitter and receiver is touch after replacing the battery.Item, the item is undefined, just manually pair to fix. of the Product Feature: White Shielded Power: 90-220V Range: 80m Instructions pairing: 1. Press the button on the receiver until the LED lights up; 2. Press the call button once to establish a connection with the recipient. 3. The blue light flashes to confirm 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 continues to flash, indicating that the battery is low, please replace the battery; 2. After replacing the battery, the pairing between transmitter and receiver may lose contact, the item is undefined, just manually pair to repair.