Description:Pairing instructions: 1. Press the volume button on the receiver and hold it down until the LED lights up; 2. Press the call button once to establish contact with the receiver; 3. The blue light will flash to confirm successful pairing; 4. The receiver will automatically exit pairing mode; 5. The system is ready for use. If the call button and the receiver lose contact, repeat the process.Colour: White Transmitter power supply: 90-250V Package includes: 1 * Personal alarmNote:1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding2. The color may vary depending on the display. Please understandNote:Hello, please pay attention to your shipping address when purchasing products. If your receiving information (such as name, street, house number, doorbell/email without name) is incorrect, the order will not be delivered correctly.)