Feature：

Ringtones available and 3-step volume control （0 ~85dB）, When someone presses the doorbell, the eye-catching backlight flashes. Especially suitable for the elderly, deaf and pregnant women, use machine learning to prevent interference from other wireless transmitter, Design service life up to 25 years.

Specification：

② Receiving distance: 300m (in open area)

③ Size: 75x51x20mmreceiver size: 95x65x24mm

④ Voltage: AC110V-220V-240V

⑤ Transmitter 12v23a battery factory pre-installed (battery not included)

Package included：

1× Plug-in receiver

1 × Battery Transmitter

1 × EU Plug