... and circuit & waterproof 3) By GSM, GPRS tracke gps trackerFeature:* Accurate locating and tracking.* Communication mode: GSM/SMS/GPRS* Provide GPSstatus, Coordinate, Speed, Date ... history route on websiteSpecification:GPS Module: SiRF III / 32 CHANNELGPRS Class 12, TCP / IP built-in GSM module.GSM 900MHZ / 1800MHZ(Optional: ... :56mm*38mm*11.5mm More pictures:Application: Online GPS Administrating: