Strong signal ,150m long distance Transmission
Long operating range can be up to 500ft(150m) in open space,
great for large house including villas, apartment, offices, shops, warehouses, etc.
Self power generation
No need battery, press button and Kinetic energy turn into electrical energy .
Ordinary doorbell was average changed a battery once a month ,this doorbell can generate power , press button and Kinetic energy turn into electrical energy .
You can save lots of money and batteries every year,and protect environment
