and more watches .........altimeter, barometer, digital compass and more. Additional features include dual time, easy access to daily total ascent/descent, as well as a complete heart rate monitor (HRM). Other features include electroluminescent backlight, user-replaceable battery as well as a durable plastic casing water-resistant to 100ft/30m. Operating temperature -20 - +50 Celsius, -5 -+120 Fahrenheit.