SYSTEM FEATURES 1. SYSTEM FEATURES 1) With high anti-interference, the system can adapt extreme field environment easily. It can work continuously all the day under any weather and ensure the normal working. 2) The anti-robbery unit is with small compactness. Its long working time can assure working over 30days for one recharge. It cares nothing for moisture and shelter, which perfectly solves the problem of GPS cannot locate in the building, underground parking garage, tunnel and other places. 3) The system is easy to operate and install. Operation by mobile phone (also can building a control center, then management become very direct and easy. No need other hands help.)