Watch, Heartbeat rate measurement function: Display dynamic pulse rate, Perpetual Calendar function: Year value display ranges from 2000 to 2099, default value is January 1st 2009; 12/24-hour time format selectable, default value is 12-hour format, Alarm clock function: Triple alarm clock with alarm tone, Alarm sound duration is 60 seconds, Hourly chime function: Select to turn on/turn off this function, Stopwatch function: Maximum value is 99 hours, 59 minutes, 59 seconds, 99 with SPL function included, Countdown timer function: Maximum value is 23 hours, 59 minutes, 59 seconds, Secondary time function: Another time piece can be set, EL and LED backlight function included, Bottle Set, Includes: 1 Nylon Carry Bag, 1 Pc, of 25, 5 Oz Aluminum Bottle, 1 Pc, of 17 Oz Aluminum Bottle, 2 Pieces Color Coded Carabineers that attach to each bottle cap, Durable: Each Piece comes with color matching carabineers that attach to cap, makes it easy and fun to carry, Flexible: Keeps drinks either Hot or Cold, Leak Proof: Insulated cover makes sure that Hot nor Cold drinks are too hard to carry around, Extra-Light: Weighs no more than a plastic water bottle, Cool Designs: Good to look at as they are to drink from, Great For: Camping, Backpacking or any Outdoor Activity, Construction: Tough and Reliable, Materials: Electronic Parts (BH5000B) + Aluminum (Bottle Set) SKU: CITPNT183