Feature 1Mobile Phone Remote Push: The emergency alarm device can be connected to a mobile phone to realize remote push and take care of the elderly at home anytime, anywhere. 2Convenient to Use: When in danger, the elderly can press the SOS transmitter, and the signal will be sent to the mobile phone. 3Detect Human Movement: Intelligently associated with the for ZigBee infrared sensor, one click execution, detecting human movement at any time, and real time detection of outsider intrusion through App notification. 4Super Loud Sound: Attractive buttons with super loud sound make it more convenient for patients, the elderly, residents, and disabled people to call for help at home. No need to yell to get someone's attention. 5Detect Smart Home Devices: DIY smart link to smart home devices, and detect smart home devices such as light bulbs, switches, valves and other connected devices through APP. 6Portable Design: The SOS call button is easy to carry and can be carried in a pocket, hung around the neck, attached to the wall, etc.Specification: Item Type:SmartEmergencyButton Material : ABS, SiliconeColor: As Pictures ShownWeight:35g/1.2ozTransmit Power: 10dBmEmission Current: Peak 45mA, Average 1~2mAQuiescent Current: 2~3uALaunch Distance: More Than 100m/109.4yd (Open Space)Wireless Frequency: for ZigBee 2.4GHzWorking Temperature: -20-60Working Humidity: 95%RH (Non Condensing)Product Size:4.5x1.5cm/1.8x0.6inBattery: CR2032 Button Battery 150mAh (Included) Package List:1xButton1xManual1xCard Pin