Tennis Sensor Bluetooth Training Analyzer. Track and Record Performance Real Time. Inbuilt Battery and Memory Save up to 100,000 Strokes Android & iOS for Dunlop, Wilson, Head, Prince, Babolat, Yonex

I was really hoping this would work, but it just doesn't. At least the one I received didn't work. It charged as it was supposed to and I could connect it to the app on my phone, but the sensor itself didn't turn on to record my swing data. The instructions say to shake the racket to turn it on, but that didn't work. I played for an hour with it on my racket on two occasions and it never turned on or recorded anything even though I had just charged it fully (read 100% charged in the app). Thankfully, Amazon has a generous return policy.

I bought this almost a month ago for my tennis practice. It was working almost fine for the first couple of sessions, but suddenly stopped working and battery never gets charged, no matter I leave it plugged in. The other negative point, training video recording feature never worked, even when the sensor was supposedly working.

I ordered this product as a Christmas gift and she loves it! I am impressed with how much the product tracks!

It works good.

This is a clear ripoff of EVERY other sensor in market. Zepp's hardware form, Babolat's interface, and Sony's product image/description... Even used HEAD's name & players without their permission. But it's Chinese so it's not surprising.