Intelligent WiFi GSM Touch Button Household Alarm $ 51.43 Product information: Product Name: burglar alarm Alarm loudness: 80dB Backup battery: 1.5V lithium battery Wireless distance: 120m (open space) Battery standby time: 6H Supporting calling cards: China Mobile and China Unicom Power supply: 5 (V) Communication mode: WiFi GSM Relay drive: None Probe input mode: wireless Type: anti theft alarm host Number of defense areas: 100 Alarm mode: telephone alarm Number of configurable wireless devices: 100