Dual Display: Dual digital display battery diagnostic instrument with voltage and current display function, support reverse connection and wrong connection protections. Dual LED Indicator:Red Light On:On behalf of a nice connection with the storage battery,the red screen will display the current voltage of the storage battery;the blue screen will display the current(no current load,0);Blue light On: Connection to the vehicle on-board diagnostics red screen will display the current integrated voltage;the blue screen will display the real-time current generated(the premise of the loss of the vehicle battery should be lower than the voltage of the backup battery) Vehicle ECU Data Memory: When replacing the car battery, it provides power to the vehicle's ECU and prevents the loss of the vehicle's ECU data. Eliminates the need to reset the vehicle's electronic equipment after replacing the battery, saving time and energy. On-Board Diagnostics Connector: This tool is easy to use, just connect it to the vehicle's onboard diagnostics port before replacing the battery, and then follow the normal step to replace the battery. Throughout the process, the vehicle's electronics (digital clock, dashboard information, memory seats, stereo, antiskid system, rearview mirrors, etc.) are supplied with a constant power, thus ensuring that their data will not be lost. Quality Battery Clamps: With coarse copper wire, iron surfaces with nickel-plated coating, effectively plays a role in anti-corrosion and , with high insulation, strong bite, resistance to plugging and unplugging. It can be directly inserted without wiring, which can quickly replace the car battery, which can save time and increase efficiency. Name: Car On-Board Diagnostics Tester Max current: 5A Working temperature: -10 to 50 Colour:Photo Color Material:plastic Package Contents: 1 x Car Diagnostics Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.