This anti-lost device is made of , which can withstand use. It features the ABS material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Material: ABS -Size: 4.00X4.00X1.00cm/1.57X1.57X0.39in -Battery capacity: 210mAh -Battery: Button Battery(Not included) - The device can be easily connected to devices such as phones through the iSearching APP. - Users can install it on their easily lost items and valuables (such as keys and handbags), realize the functions of losing items and finding phones. - It is very practical and multifunctional, and also realize remote controlled photographing, recording and other functions. - It is simple in design, but very practical in use, which brings great convenience to you. - The lightweight and portable design makes it easy to be installed on your keys, chains and other items easily and conveniently. Package list: 1 × Tracking Device 1 ×Metal Ring