The Edge 500 is a great training tool, sacrifising some of the navigational aid of the higher Garmin models to reduce the price, but offers GPS enabled data along with the Heart Monitor and cadence sensor.

Using ANT+ technology means that the Edge 500 is compatible with Powertap Hubs to store all your data. 

Key Features of the Garmin Edge 500:

• Developed in conjunction with Garmin's sponsored athletes - including Team Garmin Slipstream
• This Bundle includes The Edge 500 head unit and ANT Plus cadence and a heart rate monitor sensors
• Smaller unit size reduces weight (it is half the weight of the Edge 705) and pares down the navigation tools to focus on GPS assisted training data
• Ability to follow uploaded courses
• A unique GPS-enhanced cycle computer that provides extensive and accurate data to make this an invaluable training partner
• Completely wireless operation, making installation easy
• Uses a high-sensitivity SiRF GPS receiver to track your movements
• The large screen can be backlit at night for easy viewing, and customised to show thedata you want
• Waterproof to IPX7 standard (up to 1 metre for 30 minutes)
• Uses a rechargeable lithium-polymer battery, providing up to 15 hours operation
• Heart Rate monitor and cadence sensors use robust ANT Plus wireless technology
• Compatible with third party - ANT Plus enabled power meters
• Monitor your pedalling cadence as you ride with this self-calibrating, wireless speed / cadence sensor
• Unit dimensions (cm) - W x H x D: 4.8 x 6.9 x 2.2
• Display size 128 x 160 pixels: 4.31 cm (diagonal)
• Weight: 56.7 grams