Features: WIDE APPLICATIONS: the circuit tester can be used to test conductivity, test voltage polarity, check lights, check motors, trace and locate short circuits, test for poor ground contact and more. Easy to Operate: After simply connecting the unit to the vehicle's battery, automotive technicians can conduct positive and negative battery current to the tip by cranking the power switch forward or backward. INTEGRATED 6-24V DC TEST KIT: Do not use at AC voltage. Accurate Voltage Measurement: The electric circuit tester is capable of measuring DC voltage ranging from 6V to 24V. Its precise digital display ensures more accurate readings than other ordinary voltage testers, making it an essential tool for reliable and precise vehicle electrical diagnostics. Overload Protection: With an automatic cut-off feature when the current exceeds 8A, the car probe circuit tester ensures safe and reliable use, protecting both the user and the vehicle from potential damage. Built-in Buzzer and LED Light: The probe tester comes with an integrated buzzer and LED light, enabling easy and convenient use even in low-light or dark conditions. Extended Cable Length: The tester is equipped with a 4.5m/14.76ft long cable, providing the flexibility to test from the front to the rear of the vehicle, eliminating the need for constant searching for a proper vehicle ground. Wide Application: The car circuit tester offers a wide range of testing capabilities, from continuity and voltage polarity testing to tracing short circuits and checking ground contacts. Operating Instructions: Unfold the unit's cables. Clip the red clip to the positive terminal of the vehicle battery Clip the black clip to the negative terminal of the vehicle battery Product Specifications: External power supply: 12V or 24V DC power supply from vehicle battery Overload protection current: 8A DC voltage range : DC 6~36V Rated current: 1-8Amp Name: Automotive Electrical Circuit Tester Wire length: 4 meters Machine size: 260*40*28 mm Box size: 280*132*50mm Packing weight: about 390 grams (full set) Packing List: 1 * Circuit tester 2 *Instruction manual Translated with DeepL.com (free version)