Disappointed by this product because the battery cover can not be attached to the eTrex Vista Cx I bought with, unlike the compatibility announced by Garmin (whether on amazon or even on the papers given with the product) . Indeed, the eTrex Vista Cx has the particularity to have a 64 mo integrated SD card, instead they just next to the battery, which changes the contour of the area. Fortunately, the eTrex Vista Cx was livery with its own adapter for attaching over the bike mount. In conclusion, if you count equip you with a Etrex vista, rather buy the product "Bike Mount" alone (without the lid). You will save ten euros.