Quantity 1 Color Black + grey Material PU + stainless steel Functions Hour minute month and day display; Time sharp clock alarm clock stopwatch timer (1/100s) heart rate test combusted calorie calculation Cable Length 25cm Screen Size 1.5" inch Power Supply 1 x CR2032 Gender Unisex Band Material PU Casing Material Stainless steel Backlight No Movement Digital Display Format 12 hour format Features Five mode: time alarm clock stopwatch sport time heart rate; Band is made of quality PU material anti-corrosion anti-hardening and abrasion resistant; Soft and wearing comfortable; Suitable for different people at different places in all seasons; Band is adjustable; Battery can be used for 3 years normally; Can help you know your heart rate in sport and how many calories is consumed; Great for making your own sport plan Dial Diameter 4 cm Band Length 18 cm Band Width 2 cm Battery 1 x CR2032 Packing List 1 x Multifunction wrist watch 1 x English user manual