SMATRUL M688 Self-powered Wireless Doorbell 1 Transmitter 1 Receiver - EU Plug - Black

• 4 Modes: Sound only, flash only, sound & flash, sound & light on.Light on mode can turn into a nightlight

• Memory function: After the power is turned off, remember the music set before. No need to set music again

• Self-powered doorbell that requires no battery,Don't worry if the battery has power, so Don't miss important visitors

• Gorgeous lights, loud ringtones. Especially suitable for the elderly, sluts.

• Clear sound, no noise, loud sound

• 4 files volume 0-100DB Ringtones: 58 pcs Rated voltage: AC 110~ 240V, 50-60Hz

Specification:

• Receiving distance: 150m (in open area)

• Volume: 4 files 0-100DB, ringtones: 58pcs

• Rated voltage: AC 110~ 240V ,50-60Hz

• Working frequency: 433MHz

• Receiver standby power:< 0.5W

• Receiver size: 86X78mm

• Button size: 80x41mm