Tech4o digital compass watches, altimeter watches, and barometer watches are the ultimate tool for the outdoor enthusiast. A Tech4o digital compass will navigate the densest of cover. Tech4o precision altimeter is the perfect digital companion for wayfinding, while the barometer helps you monitor changing conditions. Be a Traileader Pro with Tech4o's digital compass watch, altimeter watch, and barometer watch. The Traileader Pro also features alarm, chronograph, count down timer and much more.