FLYMEI Waterproof Wireless Doorbell Chime Kit - 36 Different Ringtones with 4 Adjustable Volume Tunes To Choose - Plug in door chime - Blue LED Light - 1 Transmitter + 2 Receivers - White Up to 36 melodies to be selected. When the push button is pressed you will be promptly notified by the chimes and flash LED indicator. Sound and flash, volume adjustment. Build in anti-interference design, avoid the interference between users. CE and ROHS certificated. IP44 water resistant transmitter and is safe to keep outside in any weather. Dustproof design. Door chime kit of 1 push button and 2 Receivers support a wireless range of up to 1000ft/200 m in open area. Easy to plug receiver into an electrical outlet (no batteries required for main receiver). Save energy. Can be applied to care the old and patient or send emergency notice. The light from the receiver provides convenience for night operations.