The detector is using advanced technology from Germany, it can collect and analyze signals under non-dismantle automotive electrical parts. Testing results are showed by LED indicator and beeper. Easy to test if there is faults of the automotive electronic parts. Features: Pen Type Detector: help to diagnose the car ignition system easily and quickly, the mini compact tester has good durability and easy to carry out. Dual Test Range: level I for strong magnetic field testing and level II for normal testing, both has corresponding status indicator LED light. Dual Alarm: visual and audio alarm to indicate the condition of the testing part. LED Illumination: bright LED light for lighting up the observing area during working in low light situations. Easy to Use: one key operation, direct detection, rapid induction. Wide Test Range: ignition coil(traditional coil, double spark coil, single spark coil) generator, fan, electric-magnetic valves, emission gas controlling value, fuel injectors, relay, etc. Specifications: Material: ABS Power Supply Voltage: 7V Working Temperature: 20~50 Power Supply: 2 * 1.5V AAA battery (NOT included) Item Size: 153 * 19 * 25mm / 6.02 * 0.75 * 0.98in Item Weight: 25g / 0.88oz Package Weight: 50g / 1.76oz Package Size: 21 * 11 * 3cm / 8.27 * 4.33 * 1.18in Packing List: 1 * Auto Ignition Coil Tester