Wireless transmission: The wireless SOS button is mainly used with the alarm host for the elderly, bell buttons, etc., combined with the host, full wireless transmission. Convenient and reliable: The button alarm is perfect for the elderly, children, the disabled, pregnant women or patients who need assistance. Attract attention by simply pressing the call button, without shouting. Personal siren: we can carry this push button siren with us, the siren can be mounted on the wall or in the pocket caregiver, it is compact and portable. Powerful: This button alarm can be automatically sealed, anti-pressure, anti-collision automatic control device, safer and more secure. Button d Wireless SOS alarm The button is mainly used in conjunction with the code alarm host. In an emergency, when the button is pressed, an alarm signal will be sent to the host via wireless transmission, so that the emergency can be resolved in time. It is very suitable for the elderly, children, the disabled, pregnant women or patients who need help. Simply press the call button to attract people's attention, without shouting. Using 433MHz wireless transmission frequency, no wifi or wiring, strong anti - interference, stable transmission. Wireless distance of 80 meters (walls and other objects will be lowered), can eliminate interference from other equipment when in use, and can be used almost anywhere, indoors and outdoors. Automatic control device with automatic waterproof, anti-pressure, anti-collision, safer and more secure. The alarm can be mounted on the wall or in the caregiver's pocket and can be taken with you. The battery life can be up to 3 years, no need to change it from time to time, reducing unnecessary trouble. Model number of item: xJY-YK01 Modulation method: ASK/OOK (Amplitude Modulation) Operating Voltage: DC12v Quiescent current: <100NA (almost no power consumption) Operating current: <15MA@12V Transmit Power: <180MW @ 12V Transfer Rate: <10 KB/s Working method: copy type Working frequency: 315MHZ/433.92MHZ (frequency between 240-960 can be customized) Transmission distance: 150M (open space, receiver sensitivity is -107 DBM) Scope of application: home remote control switch/shopping mall burglar alarm, electric vehicle, automobile, motorcycle alarm.</ Various door and window controllers and other industrial controls. All kinds of remote controls, electric curtain rolling doors, parking lot road control and other wireless remote control fields. White color Cut : 58.5*33.5*12mm Number of pieces sold: 2 pieces