Eufy Security 5 - Piece Home Alarm Kit, Home Security System, Keypad, Motion Sensor, 2 Entry Sensors, Home Alarm System, Control From the App, Links with eufyCam. Product colour: White, Alert notification type: GSM, SMS. Central control unit interface: RF Wireless, Central control unit connectivity technology: Wi-Fi, Wi-Fi standards: 802.11b, 802.11g, Wi-Fi 4 (802.11n). Door/window sensor interface: RF Wireless, Door/window sensor connectivity technology: Wi-Fi, Door/window sensor operating temperature (T-T): -10 - 50 °C. Siren connectivity technology: Wi-Fi, Siren operating temperature (T-T): -10 - 50 °C, Siren dimensions (WxDxH): 56.2 x 22 x 56.2 mm. Package type: Box