Wide range applications: EM285 circuit tester can be used to test continuity, test polarity of a voltage, check lamp, check electric motor, follow and locate short circuits, test for bad ground contacts etc. Long test lead: The cable length is about 16ft which allows you test any electrical system easily Short-circuit protection: The unit has short-circuit protection and can test for bad ground contacts instantly Easy operation: After a simple hook-up of the unit to the vehicle's battery, automotive technician can conduct a positive or negative battery current to the tip by rocking the power switch forward or backward Comprehensive 6-24V DC test kit: Do not use on AC voltage Specifications: Type: Automobile fault diagnosis instrument Working temperature: 58 (℃) Working voltage: 6-24V DC Packing size: 26.5*9*4cm Packing weight: 320g Overload protection: 8A (When the current exceeds 8A, this item will automatically cut off the current) Applicable models: various models