Misfit Shine fitness pebble coming to the UK, £79, Fitbit and Nike watch out - photo 1Misfit Shine fitness pebble coming to the UK, £79, Fitbit and Nike watch out - photo 2Misfit Shine fitness pebble coming to the UK, £79, Fitbit and Nike watch out - photo 3Misfit Shine fitness pebble coming to the UK, £79, Fitbit and Nike watch out - photo 4