Fangrui Product Details Elderly Pager, Watch Button, Watch Transmitter Watch Wireless Remote Control, Sos Button, Watch Wireless Remote Control, Product Introduction: Wireless Watch-style Button, Mainly Used In Places Where Help Is Needed The Style Is Novel, Easy To Carry, Simple To Use, And Especially Suitable For The Elderly. Watch Design, Easy To Carry And Use; Can Be Used With 433.92mhz Host Technical Parameters: 1. Working Voltage: 12v27a; 2. Working Current: 13ma; 3. Working Frequency: 433.92mhz, 315mhz Can Be Customized 4. Frequency Deviation: 0.2mhz; 5. Transmitting Power: 10mw; 6. Transmitting Distance: 100m (open Space); 7. Encoding Chip: 1527; 8. Modulation Mode: Ask/ook 9. Working Temperature: -10 +55 10. No Delay, Trigger Immediately Colour:as Shown Material:abs Package Contents: 2 X Pager (black+white) Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Litt