Feature:  Anti-temper funciton;  The alarm sound is over 120 db;  It has bright flashing light;  Built-in rechargeable backup battery;  Can work with all of our alarm systems;     Specification:  ...

Product Name: M525 doorbell receiver;  Working Voltage: AC100-240V;  Dimension: 59*18*93mm;  Wireless distance：150meters( open area );  Working Temperature: ( -10℃ to 50℃ );  Multi function: doorbell /welcome/alarm;    Product Name: F51...

Specifications： Item Type: WiFi Doorbell; Material: ABS; Color: White; Size WIFI host: 120*46mm; Dingdong machine: 75*31mm; Video: 1920x1080/30fps; Visual Angle: 130°; Infrared: Auto dual filter switch IR LED; Network: WiFi...

Specification Item Type:  Wireless Intercom Doorbell; Indoor unit input voltage:  5V/1A; Color :  Black+Silver/Black+Gold/White+Gold/White+Silver; Weight: 208g; Technical Parameters Material : Plastic Metallic materials; Working voltage:  3*alkaline battery (1.5V*3) (Not Included Batteries); Working temperature: -20-55 degrees; Inputs: DC100-240V; Working frequency: 467MHZ; Transmission...

Features:  --Remote control:3G/4G/wifi,control anywhere with your smart phone.  --Smart timer:can work normaly even without network if you set up in advance.  --Cycle timer:make the device work automatically and periodically,no need...

Specification:  Unlocking working current: 180mA;  Working current without motor: 3mA;  Standby current: 16uA;  ESD: +/- 4KV air, +/- 8Kv contact;  FRR:<1%;  FAR: <0.002%;  Identification time (unlocking time): < 300ms;  Store...