Pyle Thermo watch includes a thermometer for Temperature inside the water or out. This watch is also equipped with a chronograph, countdown timer, and electro luminescent backlight, Thermometer Resolution: 1 °C (1 °F) Range: -9 °C to 70 °C (16 °F to 158 °F) Display Unit: °C or °F (user option) Dual Time Time: hour, minute and second Chronograph Resolution: 1/100 second Range: 23 hours 59 minutes 59.99 seconds Memory: 1 split Countdown Timer Water Resistance: 330 Feet / 100 Meters / 10 ATM