Suunto GPS POD for Training Series (T3, T4 and T6)

Bring the ultimate in accurate speed and distance sensing to your Suunto Training Instrument. GPS-Based speed and distance sensor for all outdoor sports clips fast and easy to your arm or any strap or belt Easily operated with one-button - one-mode Send 2D speed/distance information at speeds less than 20km/h. When speed is 20km/h or faster the POD sends 3D Speed/Distance information to the wristop so you will be able to measure altitude changes. Two user-replacable batteries last a minimum of 10 hours (Size AAA) It's small for a GPS with approxmiate dimensions: 68mm Diameter (about 2 and 2/3 inches), 22mm Thickness And it's light, only 77 grams (only 2 and 2/3 ounces), including batteries, but not including clip-fix and strap.