Tiny, weighs nothing, works good.
The Suunto Foot POD Mini is a teensy, weensy little guy that clips on the laces of a running shoe. It measures the speed and distance of a run and transmits the data to a Suunto watch like my T3d. Not only is this device tiny, but its also so light weight that I dont even notice it attached to my shoe.
Suunto says the Foot POD Mini works both indoors and outdoors, but I've only used it outside on the roads and trails around Salt Lake City. As far as I could tell, the Foot POD Mini was accurate in telling me how far I went on a run, as it matched the advertised mileage of a lap around Liberty Park.
It's also waterproof... unless you're going to go scuba diving with it. You can take it down 100 feet actually, so you'll be fine splashing through a few puddles with this on your shoe.
Great product and a must have for Suunto fans whp are in training or just want to keep track of their mileage.