Wrist Watch RF Remote Control Transmitter Watch Type Call Button Wireless Remote Control SOS Emergency Button

working voltage: DC3V; working current: 13mA; Working frequency: 433.92MHz Frequency deviation: ±0.2MHz; Transmitting power: 10mW; Working distance: 10-100m Modulation mode: ASK; Working temperature: -20 ° C ~ +70 ° C. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:White Material:ABS Package Contents: 1 x Watch style pager 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 little different from the real thing. The measurement allowed error is +/- 1-3cm.