Connected doorbell and video door phone - Universal - Wireless automatic doorbell 58 Music long distance(The black) Highlights Universal Wireless automatic doorbell 58 Music long distance(The black) Self-powered wireless doorbell 58 music long distance 4 modes: Sound only, Flash only, Sound & Amp; Flash, Sound & Amp; Light on. Light on mode can become a night memory function: after the power is off, remember the music play before. No need to put music Agaigorgeous Lights, loud ringtones.Especially suitable for the elderly, pregnant women, s. Clear sound, no noise, loud sound 4 Files Volume 0-100DB Ringtones: 58 pcs Rated voltage: AC 110~240V, 50-60Hz Self-powered button and waterproof instructions Other parameters: 1. Receiving distance: 150m (within the open area) 2. Volume: 4 Files 0-100DB, Ringtones: 58 pcs 3. Rated voltage: AC 110~240V, 50-60Hz 4. Working frequency: 433 MHz. 5. Vetique power: CE certification adopted