Material Electroplated alloy + stainless steel + plastic Brand N/A Model JD-0168 Color Silver + white Quantity 1 Power Supply DC 12V~8.4V Remote Controlled distance 10~50m Voice Decibels No loudspeaker Battery Type 12V 23A battery bar Certification N/A Other The alert system is composed of magnet steel reed pipe and emitter; When the rolling door is pried up 2~3cm the siren will ring and signal will be sent automatically to the control machine and call the preset phone number; The red LED will light when battery is low; Working current/voltage: 0.5A/100V; Power: 10W; Contact resistance: Packing List 1 x Alert 1 x Battery 4 x Screws 1 x Plug-in code