ITEM NAME:2pcs 95DB DC 3-24V High-decibel Electronic Buzzer Beep Alarm Intermittent 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 Included: 2 Pieces Intermittent Beep Alarm.Alarm Height: 15mm. - - Min Sound Output at 10 cm: 95 DB. - - Color: White. - - Resonant Frequency: 3100Â ±500.