Nedis Home Security Motion Detector Chime 8 Ringtones Signals with light & sound - ALRMMW20WT

• Battery operated (6x AA, not included) for maximum flexibility in placement
• Low power usage of less than 300 uA to last up to a year on batteries
• Adjustable sound volume up to 85 dB to fit to each situation
• Wide detection range to notify you on each visitor
• Wireless communication on 433 MHz over a distance of over 80 meters