Garmin Edge 705
Cycle computers are getting seriously smart. They used to tell you your speed and distance but the shrinking of GPS technology means that, with Garmin's latest Edge, you can also determine altitude, track your route on a map, load and share courses and monitor your heart rate and cadence. All this in a compact, user-friendly, sturdy unit that fits easily to your handlebars, with the included mount.
Where: Amazon (www.amazon.co.uk)
How much: £236.18