Features: 100% Brand new and high quality! Compact innovative design With 105 dB ultra-loud warning sound design, effectively deters the invasion of thieves. Host double-sided stickers for easy stallation. Remote operateion: Easy to use. Specifications Condition:brand new Power supply: 2 x AAA (7) batteries (battery not included) Operating temperature:-10~60℃ Effective distance range: 150 M (in open space), 20M ( with obstacles) Working environment humidity: