Overview: This one machine three (doorbell #43; telephone #43; burglar alarm) intelligent perfect. 2.4 inch TFT full color LCD screen display, ultra-thin, ultra-small and delicate touching design, beautiful. One-button SOS secret call for help; support duress code, can secretly call the phone in case of emergency; care for life security. Specifications: Power supplys: 110 ~ 230VAC (input) 5V / 1.0A (output) Remote Control Battery: CR2032 button battery 210mAh (included) Doorbell Battery: CR2032 button battery 210mAh (included) Backup battery: 3.7V/500 mAh Standby current: 80uA Alarm current: 500mA GSM network communication system: 850/900/1800/1900mHz FIFI standard: IEEE802.11b/g/n wireless standard Working temperature: -10C-60C Working humidity: 95% Wireless frequency: 433MHz Alarm alarm horn: 85dB Transmission outdoor wireless power: 1014dB Alarm transmission: FIFI #43;GSM transport Product size: 160 * 100 * 12.5mm / 6.3 * 3.9 * 0.5in Package size: 24.1 * 14.1 * 7.5cm / 9.5 * 5.6 * 3.0in Package weight: 660g / 1.46lb Package List: 1 * Wifi #43;GSM #43;GPRS Network Voice Alarm System 1 * Upgrade Wireless Anti-pet Infrared Detector 1 * Wireless Door Magnetic Detector 1 * Wireless Doorbell 2 * Wireless Remote Control 1 * USB Cable 1 * User Manual