These flush-mount alarms fit into any 40-series round hole and require no tools for installation. They utilize industry standard grommets and pigtails. The alarms are well-suited for applications requiring a compact profile. Weight: 12 oz. (341 g) *Self-Adjusting The 4028 and 4028K self adjusting alarms operate at 10 decibels above the ambient noise, up to 97 dB, to reduce noise while maintaining safe operations. U.L. recognized for electric vehicles and forklifts.
Amps	Volts	Volume	Type	Approval	SAE Class	Temperature Range
0.2	12-48 VDC	Self-Adjustable 77-97	Speaker	UL	Type C - E	-40F to +185F