Note: Use with 433.92MHz host (excluding host) Caller for the elderly, watch emergency button, watch transmitter, watch call button, watch wireless remote control, SOS emergency button, watch wireless remote control, Product introduction: Wireless watch-type emergency button, mainly used for places requiring emergency help, novel style, easy to carry, simple to use, especially suitable for the elderly. Watch design, easy to carry and use; It can be used with 433.92MHz hosts Product parameters: Working voltage: 12V27A; Working current: 13mA; Operating frequency: 433.92MHz Frequency deviation: 0.2MHz; Transmission power: 10mW; Launch distance: 100m(open); Coding chip: 1527; Modulation mode: ASK/OOK Operating temperature: -10 ~ +55. No delay, trigger immediately Scope of application: Nursing home, hospital, home, old people Colour:Black Material:ABS+Rubber Package Contents: 1X 433.92MHz Wrist Watch Call 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.