Step 2: Cover the tective cover.

Step 3：Connect the power supply and adjust the working frequency .

Step 4：Observe the spark plug test status through the tective cover.

AUTOOL SPT101 Car Spark Plug Tester Feature：

1. [ Dual Hole Testing& Time Saving]: The AUTOOL SPT101 Car Spark Plug Tester is able to dual-hole simultaneous testing as well as analog engine working, which is much more efficient and time-saving.
2. [0 to 6000rpm Operating Frequency]: The AUTOOL SPT101 Car Spark Plug Tester is designed with adjustable working frequency, the range can reach 0 to 6000rpm. Can be adjusted as you required.
3. [Widely Application]: 12V Gasoline vehicles car spark plugs, 100V-240V input voltage .
4. [Easy operation Plug And Play]: Easy operation, plug and play. Come with indicator light, the status of the spark plug can be displayed more intuitively.
5.[3-YEAR WARRANTY]: For damage caused by non-human factors, AUTOOL mise to resend parts for free within 3 years. For any needs, you are warmly welcomed to contact us and we will get back to you ASAP within 24 hours.

Packing List：
1* AUTOOL SPT101 Car Spark Plug Tester main unit
1* Packing box
1* User manual
1* Power supply connector