An ideal single channel gasoline fume detector. Features high tech styling, compact size, circuitry test and alarm horn mute functions. The power on indicator lamp automatically increases in brightness in daylight and softens at night. Package includes: a standard 2" display unit with gasoline sensor and 20' of plug together lead. 2 models available: M1R is a fume detector only, MB1R is a fume detector with blower control.