1.Working frequency of 315 MHz / 434MHz

2.Black waterproof button with indicator light

3.Remote control distance up to 100m 

4.Twenty-five polyphonic melodies for option 

5.Enclosed a two-year lifespan and energy-saving battery

6.Door chime: AC 100V-240V

7.Remote Controller: DC 12V  23A battery (included)

8.Professional remote control technology, can be easily installed at any place, no wiring

9.Three different color surfaces for your choice, met different demands

*Although line of site is not required, the maximum range is based on optimal conditions with minimal interference. Wireless range is affected by objects such as walls, trees, etc. Actual range may vary, depending on environment.