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: CITPNT423