Note: Communication with GSM/GPRS, GSM frequency 4-band 850/900/1800/1900, can be used worldwide. Switch button is just for decoration, you can only pull the battery to turn it off. This listing not include retail box and SIM Card. Features: 1. Build-in GPS personal locator 2. High sensitivity, new technology and latest GPS SiRF-Star III chipset 3. …