The Cooper Wheelock MT4-12-24-R is a red multitone horn strobe with an input voltage of 12/24 VDC. The unit is UL Listed for Fire Protective Service and for General Signaling Service. The horn strobe is listed for both indoor and outdoor use with the backboxes specified in these instructions.
The MT4-12/24-R can be field set to produce any one of eight commonly used alarm tones. Sound output can be field set to provide either HIGH (HI) dBA or STANDARD (STD) dBA sound output level. All inputs have DC blocking capacitor for compatibility with supervision when used with a Fire Alarm Control Panel (FACP).