Garmin Vivofit 2 Bluetooth Fitness Band Bundle with Heart Rate Monitor (Red)

Physical Dimensions: 21 mm wide x 10.5 mm thick (length varies based on band size; 120-175mm (small wrist circumference) and 152-210mm (large wrist circumference)
Display Size, WxH: 1.00" x 0.39" (25.5 mm x 10 mm)
Display Resolution, WxH: Segmented LCD
Negative Mode Display: Yes
Weight: 25.5 g (0.89 oz)
Battery: Two replaceable CR1632 coin cells
Battery Life: More than 1 year
Water Rating: 5 ATM