Quantity 1 Piece Color Black + white Item Shape Round Dial Window Material Resin glass Casing Material ABS Band Material PU Suitable for Adults Gender Unisex Style Wrist Watch Type Sport watches Display Digital Movement Digital Display Format 12/24 hour time format Water Resistant Daily water resistant (not for swimming) Dial Diameter 40 mm Dial Thickness 15 mm Band Length 250 mm Band Width 20 mm Battery 1 x CR2032 battery (included) Features Accurate wireless heart rate measurement; Display the percentage of real heart rate value to maximum heart rate value based on different age; Heart rate value maximum heart rate value average heart rate value; Record the exercise time and the exercise calories consumption; Set max. heart rate and low rate alarm; Step counting calorie distance exercise time; Clock calendar 12H / 24H format; Alarm timer stopwatch EL backlight 5.3KHz transmitter belt; 7 days memory record Packing List 1 x Heart rate watch 1 x Chest belt (1 x CR2032 battery included) 1 x English user manual