Check steps securely with your arm. Displays steps, clock, and calendar; Large two-stage display (displays the time on the lower level); The same method of wearing the watch (only attached to the upper left wrist) can measure walking; Waterproof to 3 atm. Specifications: External dimensions: 1.7 x 2.1 x 0.6 x 0.6 inches (43.0 x 55.0 x 14.3 mm); (1 mm); (1 mm) (excluding the band part); Batteries: LR4 mm). Life: Approximately 2 years (approx. Using 10,000 steps a day) [Caution] Please be sure to read the instruction manual (English language not guaranteed).