Maximum Performance in a Limited Edition. For multisport athletes who want to achieve their absolute best in any endurance sport. The pack includes three sensors to cover all endurance sports. Helps avoid over or under training by aiding you to train at the right intensity. Measures detailed information about your performance. The Polar Fitness test measures your aerobic fitness at rest and tells you your progress. Comes with Polar ProTrainer 5 software for analyzing, planning and keeping a training diary. What's in the box? Polar RS800CX training computer, Polar WearLink+ transmitter W.I.N.D., Polar s3 stride sensor W.I.N.D., Polar G5 GPS sensor, Polar CS speed sensor W.I.N.D., Polar IrDA USB Adapter, Polar ProTrainer 5 software CD, RS800CX Getting Started Guide, G5 GPS sensor User Manual, s3 stride sensor W.I.N.D. User Manual, CS speed sensor W.I.N.D. User Manual.