Since we let you see what it is on the show, I can tell you it’s the Diotuss Rechargeable Grip Strength Tester. Hold the grip trainer firmly, squeeze hard and the dynamic strength number will be automatically displayed. After you let go, the result number will be displayed for 3 seconds and then the screen will reset and go off. The built-in 500 mAh battery can be recharged via the included USB-C cable. You’ll see how I and my camera person/spouse, Dennis Wunderlin did using this fun gadget. The max grip resistance is 220.4 Lbs(100kg): The company says their gripster is made of comfortable and durable silicone, easy to clean. It was under $20 when I bought mine on Amazon.
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