The TLT-1B GPS GSM Tracker is a vehicle remote positioning device with built-in GPS and GSM GPRS technology in compact size. It can transmit the longitude and latitude coordinates to your cell phone by the SMS. By this you can find its location on the Google maps? Or other map software. The tracker uploads positioning data through GPRS to a designated server. The user can look for real-time location-tracking historical trajectory through the Internet. Guard against theft of strongbox vehicle and outdoor equipments cargo. - Features: - Built-in SIRF Star Chipset excellent for fixing the position even at a weak signal status. Work well even in areas with limited sky view like urban canyons. - Built-in GSM GPRS module support GSM 900 1800 MHz. - Support voice call. - Support SMS communication or GPRS TCP connection. - Get the position information via mobile phone SMS or examine the path on the Internet. - The available SMS takes the control command change tracing function or switch GPS. - Support establishes three telephone numbers. SOS button send out exact location for immediate rescue action. - One key for easily use. - The major technological index of the device is in conformity with the international standard of GSM mobile phone. - Portable compact size low power design. - Support cut-off electricity and oil function and recovery command - Support electronic fence function - Caution: - Please read the handbook carefully and operate in right way to avoid anything wrong; - The installation of this product suggests to the professional taxi firms to ensure the safety of the using and hidden of installation. - The picture in the user manual may be different from the real products. Please follow the products. It is not separate explained. - Specifications: - GSM module: MTK program GSM 900 1800 dual-band; Support the TCP protocol - GPS Chipset: SIRF-Star III chipset - GPS Sensitivity: -159dBm - GPS Frequency: L1 1575.42MHz - C A Code: 1.023MHz chip rate - Channels: 20 channel all-in-view tracking - Position Accuracy: 10 meters 2D RMS - Velocity Accuracy: 0.1 m s - Time Accuracy: 1 us synchronized to GPS time - Datum: WGS-84 - Reacquisition: 0.1 sec. average - Hot start: 1 sec. average - Warm start: 38sec. average - Cold start: 42sec. average - Altitude Limit: 18000 meters (60000feet) max. - Velocity Limit: 515 meters second (1000knots) max. - Acceleration Limit: Less than 4g - Jerk Limit: 20m sec - Operating temperature: -25 to 70 Celsius - Humidity: 5% to 95% Non-condensing - Voltage: 12V~24V - Build-in GPS+GSM module - Antenna module (GPS+GSM integrated) - 4-pin cable