Sleek, stylish, lightweight design that "wraps" the GPS antenna around part of the wrist for a better view of the sky, improving reception during training. High sensitivity GPS receiver provides faster acquisition times and improves tracking under trees and near tall buildings. Customizable screens let you view up to 12 data fields on 3 data screens for immediate feedback on the information you need most when training. Easy to use — no calibration required. Just turn it on and go Customize your Forerunner 305 to get the most out of your training. To help you achieve your personal best, the Forerunner 305 includes the following smart features: Courses feature lets you download recorded courses and compete against previous workouts Auto Pause - pauses and resumes training timer based on a specified speed so you never have to start or stop the timer. Auto Lap records lap data when you reach a specified time, distance or position so you never have to punch the lap button. Virtual Partner lets you train against a digital person at specified time, distance or pace goals. AutoScroll cycles through data pages during a workout. Included Garmin Training Center software helps you tailor workouts to meet specific goals and objectives. Create your own workouts or use workout templates included on the CD. Interactive analysis tools let you chart performance overlaid on a map.