Material Plastic Brand No Model ML-V006B2 Color White Quantity 1 Power Supply Receiver: 2 x AA batteries (not included) transmitter: 1 x 12V battery (included) Remote Controlled distance 100~150m Voice Decibels 60~70dB Battery Type 2 x AA batteries 1 x 12V battery Other Easy to install; Digital quartz crystal section repetition rate: 1/10000; Low power consumption; 3 color light flashing and dancing when music playing allowing old people or people w/ auditory problem know doorbell is ringing Packing List 1 x Transmitter 2 x Receivers 1 x Battery (12V / 23A) 2 x Screws 1 x Sticker