Features:  1. Detect gas leakage app notification and alarm sound pressure: ≥85dB/m. Alarm concentration: 10%LEL.  2. Easily install on the wall or any surface by screws or tape.  3. Power...

Features:  1. Highly stable semiconductor gas sensor;  2. Smart phone remote monitoring;  3. Support driving manipulator;  4. Automatic calibration, with strong consistency;  5. Voice prompt.  6. Ultra-low power consumption design; ...

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...

Description:  Wireless doorbell no battery need and no wire. When users press the button, energy converting module inside will change the mechanical energy into electric energy. Then the wireless module...

Specification:  Doorbell Type: Wireless;  Model Number: H12Power Source: Battery;  Power Source: AC;  Power supply: 110V-240V;  Frequency: 433MHz;  Waterproof: Yes;  Battery mode: CR2032 Alkaline Battery ( not include battery );  Receiving...

Specifications:  Doorbell Type: Wireless;  Type: Doorbells;  Model Number: FA86;  Power Source: AC;  Type: Doorbells;  Doorbell Type: Wireless;  Type: Doorbells;  Ringtone: 60 ringtones;  Volume: 5 levels 0-110dB;  Receiver power supply: 110-220V; ...

Specification:  Working voltage: AC 110-230 (V);  Working temperature: -15~60 (℃);  Detection distance: 100 (m);  Transmission frequency: 433 (MHZ);  Installation method: Mounted;  Launch distance: 100 (m);  Weight: 50 (g);  Alarm mode:...