1.The product is easy to install.
2.The audio of the chime is very loud, it can be adjusted according to user’s preference.
3.120 metres operating range(in open area)
4.No need battery,the transmitter is working with self-powered.
Operating range:120 metres(in open area)
Volume:adjustable of 3 levels
1 x Doorbell Buttons
1 x Doorbell Receiver
1 x Screw set