Square Bluetooth® Anti-Loss Device

This tracker is powered by 1 replaceable button battery (included). Support Android system 4.3 or above, Apple iOS system, etc. By using the "isearching" APP software, Bluetooth® connection with mobile devices such as mobile phones, which bundles items that are easy for users to lose or valuables such as keys, handbags, etc., to use search function of the items. The effective distance is up to 15 meters in the open range, even you can use it on your baby or pet. 1.5"" L x 1.5"" W x 0.28"" H