Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
JFIND JF109 Car Double Hole Spark Plug Tester, JF109 (US Plug), JF109 (EU Plug)Feature: 1. It has two testing holes, you can test two spark plugs meanwhile and and if you suspect any spark plug works improperly you could compare and test to make accurate judgment. 2. Adjustable double hole car spark plug tester detector ignition plug analyzer diagnostic tool. 3. Usage: test spark plug performance and ignition strength 4. Application range: 12V Gasoline vehicles car spark plugs 5. Widely application: 100V 240V input voltage . 6.
Feature:1. It has two testing holes, you can test two spark plugs meanwhile and and if you suspect any spark plug works improperly you could compare and test to make accurate judgment.
2. Adjustable double hole car spark plug tester detector ignition plug analyzer diagnostic tool.
3. Usage: test spark plug performance and ignition strength
4. Application range: 12V Gasoline vehicles car spark plugs
5. Widely application: 100V-240V input voltage .
6. Test principle: In automobile ignition system, the high-voltage ignition coil generates a high-voltage (10000 volts or more), and the spark plug diverts it form high -tension ignition coil into the cylinder engine, spark between the spark plug electrodes will ignite the mixture. The JF109 could tell the good spark plugs from the bad by the strength of the spark.
Using Note:
1. Please Turn Off Power before you place spark plug
2. The Spark Plug Tester is a high-voltage detector, so do not touch spark plug with hand at work to avoid danger.
User Manual:
1. Place the Spark Plug into tester hole 1 or 2; If you want to compare the new spark plug and old one, place new spark plug into hole 1 and the old on into hole 2
2. Connect to power supply
3. Turn the key switch 4 clockwise to turn on tester, indicator 3 will light up, tester is now working at 1000rpm/min.
4. Again turn the key switch 4 clockwise,you can adjust the working frequency between 1000rpm to 6000rpm/min.The higher the frequency, the stronger the spark strength.
Specification:
| Package Weight |
|
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 133 reviews
Sort
Product Reviews
★★★★★ 5
Wireless charger
Number of Items: 1
Works very well well!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
★★★★★ 3
Does not work if you can't lay the phone flat
Number of Items: 1
Does not work reliably if you can't lay the phone flat in the center of the charger. Found this out with my pixel 10. The camera lenses stick out and the pad is too large, leading to the phone not being able to lay flat across it. The charger recognizes the phone, but then randomly stops charging it. Does a good job on my pixel buds pro, however.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
★★★★★ 5
Quick Charge, Low Cost
Number of Items: 1
This fast charger offers impressive charging speeds at a budget-friendly price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
Soft, Reliable Toilet Paper at a Great Price
Size: 350 sheet (Pack of 30)
⭐️⭐️⭐️⭐️⭐️
You really cannot beat the price and quality of this Amazon brand toilet paper. It is very reliable, and I am pretty picky when it comes to toilet paper, so I was pleasantly surprised.
It is soft, comfortable to use, and you don’t need to use as much compared to other brands, which makes it last longer.
Overall, I’m very happy with it and will continue to purchase!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 5
The Amazon Basics 2-ply toilet paper is a solid, budget-friendly
Size: 350 sheet (Pack of 30)
It’s a practical, affordable toilet paper that gets the job done well—best suited for those prioritizing value over luxury.
The Amazon Basics 2-ply toilet paper (30-roll pack) is a solid, budget-friendly option that performs well for everyday use. It strikes a decent balance between softness and strength—comfortable enough for regular use while still being durable and absorbent. Many users appreciate the large quantity (10,500 sheets total), making it a convenient and cost-effective choice for families or high-traffic households.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026