This wireless tracker features Bluetooth 4.0 technology that will prevent you from losing your keys, phone, luggage, purse, etc. This tracker should be used with Tracing, an app downloaded from App Store/Google Play. So before using, please download the app and read the instructions carefully. The prices includes the shipping cost to CA, pls order yours today. 1.5" L x 1.5" W x 0.3" H