It is a portable handheld DC Milliohm meter, it uses 4 wires Kelvin clips to do the testing with high precision and short start time. It is designed for DIY user, electronic repair personal, technical school education and factory etc. to test low resistance application. Portable and handheld, easy to carry. Built-in lithium battery for power supply, Type-c charging port. 4 wires Kelvin Clips with higher testing precision. Built-in 3296 potentiometer, user can do self-calibration. 8888 red digital tube display. Automatically reset to 0, no need to adjust to 0. Resolution:1m Measuring range:1-1999m Testing current:about 100mA Accuracy:(0.1%+2 words) Open circuit output voltage:less than equal 4.2VDC No-load current consumption:13mA Power supply:3.7V 600mAH Charging port:TYPE-C 5V 1A Charging current:0.5A Charging indicator:Charging red LED on, Charging over LED off Accessory:4 wires clips Resistance testing method:4 wires Kelvin clips working environment:10-35 RH less than equal 80% Type:Big Clip Colour:As Shown Material:Plastic Package Contents: 1 * Handheld DC Milliohmmeter 1 * Clip 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.