The Sierra is the award-winning, top-of-the-range member of the Endura family and as such is an all-singing, all-dancing GPS device which not only offers optional Ordnance Survey mapping (UK 1:50000 in three regions at £100 per section) but also an MP3 player, video player and microphone. Whether the latter features add anything to a walking GPS is another matter. In use it’s much like the less expensive Out & Back, with an excellent Direction of Travel arrow to guide the user between waypoints; but the screen resolution here is far better, so following the map is much easier on the eyes. Data transfer is equally as clunky as its stablemate but in its favour, it boasts an electronic compass and a barometric altimeter. It also features the same excellent touch-screen and button operations.
Routes/waypoints: 500 routes; 4,000 waypoints
PC/Mac-compatible: PC only
Works with: Most software including Memory-Map
Features: Electronic compass; barometric altimeter
Battery type/claimed life: 2xAA/10-15hrs