mini size: 3.7in*1.6in, Compact with creative design Waterproof: PC material shell, IP55 waterproof, can use for outdoor Easy to install: Two kinds of installation tools, double-sided sticker and straps, with them, the alarm can be mounted on bicycle, motorcycle, car or other devices stably and stably Two methods Installation: Double-sided stickers or cable ties: It is convenient for anti-theft installation of various vehicles and batteries. Using three-dimensional displacement sensors and special algorithms, it can more accurately identify the theft and reduce false alarms such as noise interference. You can activate the SOS help function: when you accidentally fall down while driving, it will automatically send out help sound, giving you multiple guarantees. If the tilt is more than 45 degrees, it will automatically call for help, and if upright, it will automatically turn off the help sound. Product color: black Delivery quantity: Two piecesNote: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!