1. Double 13mm Hole2. 2A Power Supply3. Technical Chip4. 0-6000rpm/min5. Enhanced Resistance CoilOur Spark Plug Tester pk others:1. Double hole easy to compare the can work well2. 2A power supply can make the spark larger than the 1A power supply(1A cause poor work or small )3. Technical chips work more stably to prevent spark plugs from failing to produce 4. Enhanced Resistance Coil make the spark brighterFor JF109 Double Hole Spark plug tester support list:JF109 can support test spark plugs less than equal 13mm for Car/Motorcycles/Speedboats/Motorboats/Cropper etc.Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on.Voltage:AC100-240VColour:As ShownMaterial:ABSPackage Contents:1 * Spark Plug Tester Main Unit1 * Power supply connector2 * GasketOnly 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.