SMATRUL M688 Waterproof Wireless Doorbell 150m Range Self Powered Home Intelligent Door Bell Chime, 2 x Transmitters + 1 x Receiver - 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: 58 pcs

• Rated voltage: AC 110~240V, 50-60Hz

• Working frequency: 433MHz

• Receiver standby power: <0.5W

• Receiver size: 86x78mm

• Button size: 80x41mm