Reliable Power Backup: Equipped with a built-in backup battery, ensuring continuous protection even during power outages. Effortlessly install: this plug-and-play siren into any standard power outlet with a voltage supply of AC 100-240V. Its compact design allows for discreet placement in a variety of indoor settings. High-level Alerts:Experience high-level alerts with the siren's powerful 100db sound and vivid red light This combination of audio and visual alerts effectively deter intruders and alert in case of an emergency. Robust constructio:The robust construction of the siren ensures it is a and reliable addition to your alarm system. It is designed to withstand regular use, making it an ideal choice for both residential and commercial properties. Extensive Detector Support: Capable of pairing with other detectors Manage your home security effortlessly with the included remote control for arming and disarming.<br><br>Power supply: AC 100-240V Built in battery: 3.7V/500mAh Standby current:Less than10mA Alarm current: Less than 200mA Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Colour:Red&White Material:ABS Size:8.8x8.8x7.8cm<br><br>Package Contents: 1 x Indoor wireless alarm 1 x English instruction manual<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.