Smartphone Gimbal Gopro Accessories Stabilizer - 1 Axis Wearable Gimbal for GoPro Hero 5/4/3+ 3 and iPhone and Android (4-5.5 inches) by Wewow Sport pro (Black Blue)

The gimbal works well - on the footage I attempted to record you can see that the pivot etc works (I recorded with a Go Pro). However, mounted at the rear of the bike on the topbox the whole unit vibrated, quite a lot, rendering the footage unusable. I think if I found a better mounting position then some of the footage would be phenomenal, but it's finding this point that will be crucial.

Very good item but slight vibrations while used on a motorbike

Was brilliant until the clamp broke and not response from the seller.