mini size: 3.7 in x 1.6 in, compact with creative design waterproof: PC material shell, IP55 waterproof rating, suitable for outdoor use easy to install: includes two installation options—double-sided sticker and straps—for stable mounting on bicycles, motorcycles, cars, or other devices two installation methods: double-sided stickers or cable ties for secure anti-theft setup on various vehicles and batteries; equipped with 3D displacement sensors and advanced algorithms to accurately detect theft and reduce false alarms from noise or interference SOS help function: automatically activates ble alert if a fall is detected during operation; triggers help signal when tilt exceeds 45 degrees and automatically deactivates when upright product color: black package includes: two units