Pyle Sports PSWDV60BK Advanced Dive Meter With Water Depth, Temperature, Dive Logand Auto EL Backlight Measure Water Depth With Resolution of 0.1 M (0.5 ft), Range: 0 to 200 m (0 to 656 ft)Measure Water Temperature With Resolution: 1 Degree C (1 Degree F), Range: -10 Degree C to 60 Degree C (14 Degree F to 140 Degree F) - 99 Lap Memory Elapsed Dive Time With Resolution: 1 second, Range: 199 mins 59 secs - 3 Countdown Timer Modes - Countdown, Countup, and Repeat Store Up To 10 Dive Logs - Countdown Timer Resolution: 1 second, Range: 99 hrs 59 mins 59 secs Batteries not included.Auto Alarm - Backlight: Auto Electro-Luminescent Chronograph With Resolution: 1/100 second, Range: 23 hrs 59 mins 59.99 secs - Color: Black - Water Resistance: 20 ATM / 200 Meters / 660 Feet