MTI Industries 35-742-BR Safe T Alert 35 Series Dual LP/CO Alarm - Flush Mount, Brown Power Supply & Current Draw: 108 mA @ 12 VDC Operational Range: 12 Volts +/-15% Low voltage power warning Operating Temperature: -40 F to +158 F Case Size: 6.375"W x 2.875"H x 1.25"D