Wireless Doorbell, Aogek Waterproof Chime Kit with 52 Melodies & Adjustable Volume; 1 Receiver&1 Push Button,300M/1000Feet Operating Range Portable Plug-in(Diamond Style) 52 seletable ringtones,, 4-Level Adjustable Volume from 0-85 db,, Operating at over 1000-feet Range,, IP44 Waterproof, Easy installation, 100% customer service With 52 Melodies and Adjustable Volume:The doorbell features 52 chime tones and 4 levers of volume(from 25 ~85db ) for your choice No wiring required,neither inference to or from nearby wireless products. Easy to Use:All you have to do just is pluging the receiver into an electrical outlet(no batteries required for the receiver),fixing push button with tape or screws near the door. And . Then they can work Long Range:Supports working range up to 1000ft/300m in open area,plugin receiver for you to take it to basement,garage or second floor Striking LED Indicator Light :Push button with LED indicator to show itself at night. Receiver also lights up when it has been plugin, flashing while ringing to show someone ring to bell