Piezo Buzzer-Alarm, Constant Tone – 110VACAdditional Notes:* Panel mount, Piezo type alarm buzzer with constant tone output. Black ABS Body* Voltage: 110VAC* Current: <20mA* Sound Pressure: >90dB@ 30cm at Rated Voltage* Tone Frequency: 2.90.5kHz* Tone: Constant* Operating Temperature: -20C to ~ +60C* Thread: M27x1.5* Mounting Hole: 27mm* Connections: Screw* RoHS* Dimensions (Dia x L): 43mmx 33mm MPJA38211 SU