Easy to use Ideal as an alarm for those who need quick help, such as the elderly, children, disabled, pregnant or sick, just press the button to call for love and timely care. Can also be used at the door. Widely used in homes, hospitals, communities, restaurants, offices, etc. Easy to use Plug the receiver into an electrical outlet wherever you remember, the waterproof transmitter can be worn as a pendant or placed beside your bed. The main receiver powered by 90~250V is matched with a low-power transmitter, and the standby time is long. 52 alarm options and 80m range 52 alarm sounds to choose from with flashing LED lights. 4-level adjustable volume, up to 110db is very suitable for the elderly. No switch design, avoid missing important emergency alarms. Up to 80m range in open areas (walls and other objects reduce range) without interference from other devices. 2 Alarm Mode Call Mode: Press the SOS button once (1-2 seconds), the receiver will sound an alarm. Emergency Mode: Press and hold the SOS button for more than 3 seconds, the receiver will keep alarming until you press the volume button on the receiver. Low battery status indication 1. If there is no operation but the LED light on the transmitter keeps flashing, it means the battery is low, please replace the battery; 2. The pairing between the transmitter and receiver may lose contact after replacing the battery, the project is not faulty, just manually pairing can be fixed. Our products are made with the highest quality materials and are designed to give you the best possible user experience. We strive to ship all orders within three days of purchase, with an estimated delivery time of 8-88740 days. Please pay attention to the size of the product when shopping to ensure that it fits your needs. In the title and description, we provide detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so please feel free to contact us if you have any questions or concerns. We will do our best to help you. Thank you for choosing our product. we hope you like it