1.CAN Tester Box is a CAN Bus circuit tester compatible with 12 and 24 volt systems; 2.Testing (OBD port) if any error before connecting connecting other diagnostic equipment to , such as pin short circuit and polarity reverse connection; 3.Real-time display of communication signals ( such as communication protocol signals ) on the allocated pins which can quickly locate faults and replace the voltage measurement function of digital multi-meter; 4.Fastly connect 16 pins during vehicle maintenance diagnosis; 5.Monitoring input voltage of OBD when burning module, high and low voltage alarm; It can connect to other diagnostic tool, for example, multimeter, oscilloscope, diagnostic scanner, etc. Let you take it easy to check the problem of the car; Quickly confirm which pin has problem. CAN Tester Box is a CAN Bus circuit tester compatible with 12 and 24 volt systems; Testing (OBD port) if any error before connecting connecting other diagnostic equipment to , such as pin short circuit and polarity reverse connection; Real-time display of communication signals ( such as communication protocol signals ) on the allocated pins which can quickly locate faults and replace the voltage measurement function of digital multi-meter ; Fastly connect 16 pins during vehicle maintenance diagnosis; Monitoring input voltage of OBD when burning module, high and low voltage alarm. Specifications: Input Voltage : 9.0-32.0VDC Maximum Load : 2.0A Resolution : 0.1V Overload Protection : Yes, PTC Fuse (Self-Healing) Reverse Polarity Protection : Yes,LED On Pin 4&5 Turn Red Protocol Standard : PWM(J1850),VPW(J1850), 9141-2,DIS/ 14230-4,CAN(J-2284) Operating Temperature : 0-50,Humidity