Material ABS Brand Forrinx Model E Color Black + white Quantity 1 Power Supply 220V Remote Controlled distance 280m Voice Decibels 50~80dB Battery Type 1 x 12V 23A battery (included) Other Humanized & concise design you can insert it at any socket free of cable plug and plug. Operate range may reach 300m in open air by strict test. Adjustable 4-mode volume to meet different environment require; Stable music chip with 52 option chord music ring; With CE FCC RoHS certification.Durable use long life up to 25 years by 5 presses per day. Packing List 1 x Wireless digital doorbell 1 x Remote controller 1 x 12V 23A battery 2 x Wooden screws 2 x Plastic bolts 1 x Dual side adhesive tape 1 x English / Chinese user manual