Wireless indoor siren, Type of notification: Acoustic and LED, Alarm volume: From 85 to 113 dB at a distance of 1 m Adjusted in the Ajax app, Alarm duration: from 3s till 3 min, Indication of arming mode, Power supply: Batteries 4 × CR123A, 3 V Up to 5 years of battery life. External power supply: 12 V⎓, 1.5 A.