What is the dot on top for? How or when does it improve your shot? What's the explanation or physics behind it?

I posted a review exposing this scam product, but Amazon deleted it - they'll probably delete this as well. There is no physics behind it; it simply makes the ball spin fast. If you put the ball in this "alignment" device 10 times, you will get 10 different black lines around the ball. It does not find an "optimum equator" and it will not improve your shot in any way. Those are the facts, but other people may want to give you some "alternative facts."

where do i buy check-go pens

We no longer carry the replacement pens. I googled Pro Active Check and Go pens and up came a company that had the pens for sale.I hope this helps.

What replacement pen do you use?

Use a WASHABLE Crayola marker first to put temporary Center of Gravity spot and Straight line. Remove ball from spinner and use a Fine Tip Sharpie pen to permanently mark the Center Spot and then put the straight line on over the washable line. Let Sharpie marks dry and wash off washable marks. Use the washable marker to do the first marks cause if you use a Sharpie first you'll have messy ball marks. Replacement pens use a Sharpie.

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Technasonic Check-Go Pro Sweet Spot Electronic Golf Ball Liner

Technasonic Check-Go Pro Sweet Spot Electronic Golf Ball Liner

Product ID: 8219679

Details

Age Range (Description)
Adult
Brand
ProActive
Color
Bronze
Item Weight
0.65 Pounds
Material
Polyurethane

💡LED balance indicator

⏱️Finds sweet spot in 30 seconds

⚙️10,000 RPM gyroscopic spin

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$140.29

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In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Unlock your ball’s hidden sweet spot and drive straighter, longer shots every time!

INSTANT VISUAL FEEDBACK - LED light signals when your ball is perfectly balanced and ready to mark—never guess, always know.
UNIVERSAL COMPATIBILITY - Works seamlessly with all golf ball brands, ensuring no ball is left behind in your quest for perfection.
PRECISION SPIN TECHNOLOGY - Harnesses 10,000 RPM gyroscopic action to pinpoint your golf ball’s true sweet spot for unmatched accuracy.
RAPID SWEET SPOT DETECTION - Locates the balanced equator in just 30 seconds—because your game deserves efficiency and precision.
INTEGRATED ALIGNMENT CUP MARKER - Draw bold or subtle balance lines with the included pen and built-in cup, turning every ball into a performance asset.

The Technasonic Check-Go Pro Sweet Spot Electronic Golf Ball Liner uses high-speed 10,000 RPM gyroscopic technology to identify the true balance equator of any golf ball within 30 seconds. Featuring an LED indicator and built-in alignment cup, it allows golfers to mark the ball’s sweet spot precisely, improving drive accuracy and putting consistency. Compatible with all brands and including batteries and a marking pen, this device helps weed out imperfect balls and enhances overall playability.

Specifications

ASIN	B000IMDIAY
Age Range Description	Adult
Ball Type	golf ball
Best Sellers Rank	#56,737 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #219 in Golf Club Bag Accessories
Brand Name	ProActive Sports
Color	Bronze
Construction Type	Electronic, Plastic, Ink-based
Customer Reviews	3.7 3.7 out of 5 stars (1,635)
Global Trade Identification Number	00021089000040
Included Components	Check Go Pro, batteries, marker, manual
Item Type Name	Sweet Spot Electronic Golf Ball Liner
Item Weight	0.65 Pounds
Manufacturer	Technasonic
Manufacturer Part Number	DBL006
Material Type	Polyurethane
Model Number	DBL006
Number of Items	1
Size	One Size
Sport Type	Golf
UPC	021089000040
Unit Count	1.0 Count
Warranty Description	90 day return policy

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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