Garmin Forerunner 305 personal trainer.

-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

-Robust ANT wireless heart rate monitor with softer, more comfortable chest strap and superior battery life eliminates cross-talk with other devices to reliably measure and send heart rate data, and helps you train in your zone -

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
 
-Multi-sport capability lets you seamlessly transition between sports without resetting the unit, so you can use it for running, biking, and more

 -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 Optional GSC 10 speed/cadence sensor for use in bikiing mode.

Features:
GPS: High-Sensitivity SiRFstarIII architecture
Wireless: Communication between system devices via ANT protocol
Weight: 2.72 oz. (77 grams)
Display (WxH): 1.3 x 0.8 (33mm x 20.3mm)
Physical size (WxHxD): 2.1 x .7 x 2.7 (53.3mm x 17.8mm x 68.6mm) Lap Memory: 1,000 laps Battery: Rechargeable internal lithium ion Battery Life: 10 hours (typical use) Waterproof: IEC 60529 IPX7 standards (submersible in one meter of water for up to 30 mins.)
Alerts: Time, distance, pace and heart rate Heart rate monitor features: Physical size (WxHxD): 13.7? x 1.4? x 0.5? (348mm x 35.6mm x 12.7mm) Transmission range: approximately 3m (9.8ft) Battery: 3 years (1 hour per day)/CR2032 (3 volts) Weight: .74 oz (21 grams) Package includes: Forerunner 305 Heart rate monitor Training Center CD Docking cradle Expander strap A/C charger PC/USB interface cable Quick start guide Owner's manual