The Head Graphene XT PWR Prestige tennis racket comes with even more power than before thanks to the large sized 107in 2 (690cm 2) head & its big sweet spot. What's more, Graphene XT technology enhances the distribution of weight to bolster the head with more power, but the racquet itself is still head light. This, along with the lowered 270g (9.5oz) frame weight, ensures good manoeuvrability so you can move it faster & hit harder. The length is fractionally longer than standard at 27.33'' (695mm) which provides you with more leverage & reach on serves & all shots. The racket comes pre-strung with a Head Velocity MLT 16 string in a 16x 19 pattern, & it is compatible with the Sony Smart tennis sensor. This great device gives you an in-depth insight into your game, with loads of analysis options so you can see & improve your performance.