KnockBlock G4+ (KNB)

Marsoni

M251S

$284.50

Get it in 3 business days with 1 day shipping. Friday, May 29

KnockBlock G4+ (KNB)The G4+ KnockBlock is an essential tool for tuning and can aid in the early detection of incorrect ignition timing, lean air fuel mixtures and mechanical issues. It is used it with ear buds, headphones or noise cancelling ear muffs and features special filtering to allow you to listen in and detect knock early. Listen to one or two knock sensors Special filtering design improves signal to noise ratio Can be used with ear buds, headphones or noise

Easy Shipping

Quick Dispatch:

Your KnockBlock G4+ (KNB) orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your KnockBlock G4+ (KNB) ships.

Need Help?
Questions about KnockBlock G4+ (KNB), sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for KnockBlock G4+ (KNB) in your area.

Get Shipping Estimates

Country Zip/Postal Code

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

If your looking for a watch under $25, that will NEVER need a new battery this is what you want.. This watch is well built, with its very clear negative display. The band has a quality feel and plenty of length for guys with big wrists.. For under $25 this is one you can't go wrong with, highly recommended!!

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on March 14, 2026

Verified Purchase

Amazon Customer

Charlottesville, US

★★★★★ 4

Top Notch

Color: Khaki

The size is perfect for my wrist, needed a solar watch for work in rural law enforcement, rechargeable watches weren't cutting it & frustrating when drained, so far this watch works for me, inexpensive so if damage no worries, the design is nice, the display is bright day or night so I can see it. The wrist band is a solid fit. The alarm is loud, if your looking for a work watch to save your quality watches this is for you. I recommend this watch.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 6, 2026

Verified Purchase

Gene

Dallas, US

★★★★★ 5

Excellent value.

Color: Black

I wanted an inexpensive “work” watch so I could keep my “good” watches from getting beat up. This one is an excellent choice…solar so no battery to replace. Bright light function for night time check. No analog function is the only downside for us old folks. Overall a bargain! 👍

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 23, 2026

Verified Purchase

New eagle

Whiting, US

★★★★★ 5

Sturdy.

Color: Brown (Passcase)

Nice wallet. Well built. Comfortable. I definitely recommend this item.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 23, 2026

Verified Purchase