4G WiFi Wireless Home Alarm System DIY Smart Wireless Alarm System with TY APP Control 2.4-Inch TFT Color Screen Wired Siren/Door Window Sensor/SOS Button/Motion Detector for Home Security Input Voltage: DC5V (powered by USB Type-c standard interface) Working Current:<120mA Alarm Current:<650mA Wireless RF: Center frequency 433.92MHz, modulation mode ASK, oscillation impedance 330K Encoding Format: Receive supports 1527/2262 GSM Standard: 4G WiFi Standard: IEEE8021b/g/n wireless standard Working Temperature: -10 ℃~55 ℃ Relative Humidity:<80% (no condensation) Alarm Panel Battery: 3.7V, 1000mAh(built-in) Infrared Sensor Detector Battery: Use 2 * AAA batteries ( include) Door/Window Sensor Battery: 3V, CR2450, button battery(include) SOS Button Battery: 3V, CR2032, button battery(include) Remote Control Battery: 3V, CR2025, button battery(include) Alarm Panel Weight: 231 g/8.1 oz Alarm Panel Size: 18.5 * 12.5 * 1.5 cm/7.3 * 4.9 * 0.6 inch Wired Siren Size: 5.4 * 4.8 cm/2.1 * 1.9 inch Infrared Sensor Detector Size: 10.5 * 4 * 2.6 cm/4.1 * 1.6 * 1 inch Door/Window Sensor Size: 6 * 2.4 * 1.3 cm/2.4 * 0.9 * 0.5 inch SOS Button Size: 5 * 1.5 cm/2. * 0.6 inch Remote Control Size: 5.7 * 3.2 * 1 cm/2.2 * 1.3 * 0.4 inch