Features: Professional Automotive Diagnostic Tool with 10 test mode functionality enables rapid fault detection for injectors and solenoid, helping technicians faster through comprehensive electrical presentation analysis. Engineered with commercial grade ABS plastic for 150% durability, this tester features real time idle stepping motor simulation and obvious connection design for precise vehicle diagnostics. Ideal for professional technicians, repair shop owners, and automotive enthusiasts requiring reliable solenoid regulator testing equipment for vehicles or commercial fleet maintenance. Improving engine presentation diagnostics in workshop environments or mobile repair with this convenient testing device that replicates actual driving conditions for accurate system calibration. Combining construction with user friendly operation, this multifunctional diagnostic instrument delivers year round reliability for critical automotive electrical system evaluations and preventive maintenance checks. Specifications: Product specifications: Model: QDB-4A Power input: 8-28V Power output: 0-2.5A. VADJ output: 0-1.5a. Digital multimeter: 0-30V/0-1M Pulse width modulation: 1-100 kHz /0-100% stepping motor: 15A Product size: 17x9.8x2.8cm Package Includes: 1 set of QDB-4A automatic test note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order.