Security & precaution system, general wire layout system, equipment monitoring system of building, conference TV system, cable TV system, residence intelligence system, computer network system, computer area system, software package, automatic recording system of running the red light, monitoring & automatic recording system for vehicles, electronic computer, mobile phone and the running recorder of vehicle etc.
Special Service Item: type selecting test for security & precaution equipment, type selection for light current system equipment, network access label identification of mobile phone.
