Description: For weeks in other electronic communication equipment and tm ission without any negative impact and interference no. This machine cover is in the range of 1-15meters (depending on the strength of the satellite signal) in the range of a positioning terminal GPS, whereby positive contact with the outside world is completely broken. 1. The surface of the two international most advanced oxidation process 2.1 - 15 meters can effectively work the distance adjustment3. Low energy consumption, no harm to human bidy and enveronment protretion4. Articles for easy camouflage, small volume, low weight Feature: The color blackDimensions: 95x45x18mm / 3.7inchx1.8inchx0.7inchCharge the power supply: AC110-250VBuilt-in Battery: DC5V 1500mAhPower consumption: 0.4 / hourEffective Distance: 1-15MInstructions: 1. Open the GPS device, install the corresponding abtenna. 2. When the device is on, the indicator light is on, normal work.3. Plug in the car's power source. 4. The machine comes with a battery, working time: 1-15 hours (depending on the battery charging condition) 5. Please provide the host fully charged before use. Fully charged indicator light will turn off automatically to ensure the best effect of guest work. Shutdown can be completed after use. Note: Supported Frequencies: CDMA / GSM: 700-800MHz, GPS: 1500-1600MHz, DCS / PHS: 1805-1930MHz Packaged included: 1 X GPS AntyTracker, 3 X antenna 1 X AC / DC