Garmin's Edge 205 and 305 is a unit that combines GPS technology and basic navigation. This unit is equipped with mount that can be installed on the handlebars or stem. The design is extremely lightweight and rugged. Calibration is not required, you just need to attach this unit to the mount and it's ready to use. The high sensitivity SiRFstarIII GPS receiver Can deal with weak signals such as when you are under the tree.

The GPS receiver supplies the data so that the Edge units can generate information about the speed, distance, time, Calories burned, altitude, Climb and descent. The Edge GPS units data customizable features two screens to display up to 16 lines of data. Some features for your training aid are; 

    * Virtual Partner provides to race a virtual competitor over a specified distance and speed.
    * Courses enable you race against a Previously Recorded workout, so you cans compare your current and past performances over the Same ride.
    * Auto Pause pauses the timer Pls help you slow down or stop and Resumes Pls help you speed up again, so you focus on your ride cans.
    * Auto Lap automatically starts a new lap Each time you pass a specified location or travel a preset distance (Can you record up to 1000 laps).

Edge allows you to analyze and store the uploaded data from the Edge unit. Garmin offers free software that produce your workout data graphs. This data includes speed, time, heart rate (if you have a heart rate monitor) and elevation. This way you'll get excellent feedback Regarding your performance training. If you are serious about training for an event then Training Peaks provides numerous resources for cyclists (and Runners) including trainers advice and downloadable workouts.
Package includes Edge 305 heart rate monitor, speed / cadence sensor, or both. The heart monitor is to provide feedback about your heart rate that allows you to customize the menu of your training. The cadence monitor provides pedaling cadence and wheel speed as you ride. The unit is a self-calibrating Which unit attaches securely to the front or rear wheel of your bike. Both wireless sensors use ANT technology to wirelessly send the data to the Garmin Edge. ANT design on their personal wireless network sensors to eliminate cross-talk and interference.

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