This Seiko 5 Sports model SRPE65K, with a calibre 4R36 automatic movement has the same movement found in man of Seiko’s high-end models. With 24 jewels and a whopping 21,600 beats per hour that allows for a vigorous 40-hour power reserve. Take your look to the next level with functionality and style with this timepiece, offers fashion and convenience. - Calibre 4R36- Automatic Movement with manual winding - 40mm Case Size - 11.5mm Thickness - 75g Weight - 24 Jewels- Stainless Steel Case - Nylon Strap - 41 Hours Power Reserve - Hardlex Crystal - See-through Case Back - Screw Case Back - 100 Meters Water Resistance - Day and Date Display