**Versatile Applications:** The EM285 circuit tester can be used to test circuit continuity, voltage polarity, check lamps, check motors, track and locate short circuits, and test for bad grounds. **Long Test Cable:** The cable is approximately 4.9 meters long, allowing for easy testing of any electrical system. **Short Circuit Protection:** This unit features short circuit protection and can directly test for bad grounds. **Easy to Use:** Simply connect the unit to the vehicle's battery, and a car mechanic can easily direct current from the battery's positive or negative pole to the test head by toggling the forward or reverse power switch. **Complete 6-24V DC Test Kit:** Do not use with AC voltage. **Instructions for Use:** **Unroll the unit's cable** **Connect the red clip to the positive terminal of the car battery** **Connect the black clip to the negative terminal of the car battery** Operating Voltage: 6-24V DC Overload Protection: 8A (This product automatically cuts off power when the current exceeds 8A.) Color: Black + Red Material: Plastic + Metal Package Contents: 1 * Circuit Tester Only the above package content is included; other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.