1. Drive test ignition coil:including ignition,coil type,Module Type. 2. Drive test fuel injector:including gasoline-powered car 12V fuel injector, vehicle 12V 24V fuel injector. 3. Drive and test solenoid valves and fuel metering valves controlled by duty ratios. 4. Drive and test motors controlled by duty ratios,urea pump motors,etc. 5. Drive and test idle stepping motors,instrument stepping motors,headlight follow-up steering stepping motor and so on. Hall signal with adjustable output frequency,amplitude and duty ratio. Used to various duty cycle sensors,such as air conditioning pressure sensor(duty cycle type), air flowmeter(duty cycle type),etc. Power supply voltage range:12V-24V, with reverse connection protection,overcurrent protection. Electromagnetic coil driving current range:0-3.5A Output frequency range:1HZ-100KHZ Duty cycle adjustment:1%-100% Adjustable voltage:1.25V-11.5V Model:QDB-3A Power In:DC 8-28V Power Out:0-2.5A VADJ Out:0-1.5a :DC 0-30V/0-1M PWM:1-100KHz/0-100% Step Motor:Max 15A Product Weight:About 170g 1 set Weight:About 0.38kg Colour:Black Material:ABS Size:16.5x9.6x2.6cm Package Contents: 1 set * QDB-3A automotive ignition coil tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.