Self-stick 励式 with LED Electronic Buzzer. DC Power Supply will give you and alarm, the LED lights up. Buzzer is ringing, LED and buzzer and sync to the intermittent flashing.
[Specification] mounting: Lock Nut (mounting holes diameter Φ 32) unit dimension: Φ 36.5 ± 23.5 mm ± 0.2 tone rated: DC V 18mA: Carlin (intermittent sound) LED Color: Blue Volume: 95dB (distance 30 cm) Operating Temperature Range: – 20 to + 70 °C Note: Self-Stick 励式 Operating Voltage: DC3 ~ 15 V