Features:
Application - Can be used in automobiles, motorcycles, bulldozers, rollers and other transport machinery maintenance operations.
Safety for Use - Unique long life LED light, extended service life. Work will not produce heat, comfort and safety.
Great Feature - Innovative elastic measuring wires with excellent tensile properties. Each test with two alternate light emitting tube and a backup safety cap.
Portable - Small size, compact structure, equipped with rack, convenient to carry and use.
Time-saving - Just unscrew the test pencil top metal cap to replace the light tube, and time-saving.

Instructions:
1. test car line short circuit break.
2. polarity test of circuit
3. car battery performance test
4. performance test of charging system
5. ignition system performance test

Read the instruction and notes on packaging for more info.