Here's what other sites are saying:
Anyone who doesn't think an altimeter watch is a key piece of mountaineering gear has never had to navigate through a whiteout. Those who have know that the Highgear TerraTech Altimeter Watch can mean the difference between making it back to camp and an open bivy. Thanks to a highly accurate one-meter resolution, the TerraTech Altimeter Watch increases the chances that you'll find the right descent route and not end up rapping over some gigantic face and sharing a one-butt ledge with your climbing partner. This Highgear watch also includes a barometer to help you track weather and avoid getting caught in crappy conditions to begin with.