Are you looking for a professional, practical and reasonably priced engine ignition tester? Our products will be your good choice. It is made with excellent craftsmanship and scientific design, has excellent durability and practicality, and can help you detect the state of the coil more accurately. Sparks of different colors can provide you with results more clearly and intuitively. This is a great engine ignition tester, which will serve you very well. Features - Color: Black. - Material: ABS, acrylic, aluminum alloy. - Power supply voltage: 12 (V). - Working temperature: -20-50 ( degree centigrade). - Size: About 14.00X2.50X2.50cm/5.50X0.98X0.98inch. - It has a reasonable design structure, easy to observe and easy to use. - It is made of safe and durable materials and can provide you with a good experience. - The product comes with and gentle rubber sleeve, which is more comfortable and convenient to use. - It is specially designed to simulate the combustion conditions of the spark plug in the cylinder. It is safe and practical, and will bring you an excellent experience. - You can easily adjust the spacing you need through the knob to achieve better test results. Package list: 1 x Spark Plug Tester 1 x 55cm Detection Line