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

€ 107.57

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

🎯 Unlock your golf ball’s hidden sweet spot and drive your game to pro-level precision!

INSTANT VISUAL FEEDBACK - LED light signals when your ball is perfectly balanced and ready to mark—no guesswork, just results.
UNIVERSAL COMPATIBILITY - Works seamlessly with all brands of golf balls—no ball left behind.
PRECISION SWEET SPOT DETECTION - Pinpoint your golf ball’s true balance equator in just 30 seconds for optimized drives and putts.
BUILT IN ALIGNMENT CUP MARKER - Create custom partial or bold lines with the included pen and alignment cup for flawless aim.
HIGH SPEED GYROSCOPIC TECHNOLOGY - Spin your ball at 10,000 RPM to reveal the perfect alignment for straighter, longer shots.

The Technasonic Check-Go Pro Sweet Spot Electronic Golf Ball Liner uses patented gyroscopic spin technology at 10,000 RPM to locate 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 for improved accuracy, distance, and reduced hooks or slices. Compatible with all golf ball brands, it comes complete with batteries and a marking pen, making it an essential tool for serious golfers aiming to elevate their performance.

Specifications

ASIN	B000IMDIAY
Age Range Description	Adult
Ball Type	golf ball
Best Sellers Rank	#74,400 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #249 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 (1,638)
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.

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€ 107.57

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Belgium.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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1 week ago

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The delivery time was excellent, and the packaging was secure.

2 months ago

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