ITEM NAME:2 X SFM-27 DC 3-24V 95db Intermittent Beep Alarm Electronic Description: - Model: SFM-27 - Sound-making Type : Intermittent Sound - Alarm Height: 15mm - Alarm Diameter: 29mm - Alarm Height: 15mm - 2 Mounting Holes distance: 40mm - 2 Wires length: 105mm - Rated Voltage: 12V - Operating Voltage: 3-24V - Rated Current(MAX): 20mA - Min Sound Output at 10 cm: 95 DB - Resonant Frequency: 3100Â ±500 - Operating Temperature: -20 to +60 ℃ - Color: White Package Includes: 2 Pieces Intermittent Beep Alarm SKU: DMO0013430573004566.Alarm Height: 15mm. - Min Sound Output at 10 cm: 95 DB. - Resonant Frequency: 3100Â ±500. - 2 Wires length: 105mm. - Color: White.