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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🎯 Master your putt with pinpoint precision!

INTEGRATED MARKING PEN - Mark your ball’s sweet spot with the included pen to enhance your putting accuracy and consistency.
PRO LEVEL TRAINING AID - Elevate your game with a tool trusted by serious golfers aiming to master their putting precision.
COMPACT PORTABLE DESIGN - Lightweight (3 lbs) and sleek red plastic cylinder fits easily in your golf bag for on-the-go use.
BATTERY POWERED CONVENIENCE - Ready to use out of the box with included batteries—no delays, just instant performance.
PRECISION SWEET SPOT FINDER - Automatically detects the golf ball’s heaviest equator point for perfect alignment every time.

The ProActive Sports Technasonic Check-Go Pro Sweet Spot Electronic Golf Ball Liner is a battery-powered training aid designed to automatically locate and mark the heaviest area along a golf ball’s equator. Compact and lightweight, it includes a precision pen for marking, helping golfers improve alignment and putting accuracy. Ideal for adult golfers seeking a professional edge in their game.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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€ 140.99

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TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

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Age Range	Adult
Color	Red
Construction	2-piece
Height	2 inches
Length	38 inches
Weight	3 Pounds
Shape	cylander
Material Type	Plastic
Number of Items	1
Sport	Golf
Batteries Included?	Yes
Brand	ProActive Sports
Item model number	DBL006
Product Dimensions	25.4 x 17.78 x 2.54 cm; 272.16 g
ASIN	B000IMDIAY

ProActive Sports Technasonic Check-Go Pro Sweet Spot Electronic Golf Ball Liner

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