Infantry 51mm Big Face Military Tactical Sport Watch Large Analog Digital Wrist Watches for Men Heavy Duty Dual Time: Dual-Precision JAPANESE quartz and digital movement, 12/24Hr military time Big Face: 51mm large watch case, Heavy-duty solid watch Multifunction: Alarm, Stopwatch, Day-Date-Month, Backlight Material: Soft and flexible silicone band. Anti-Scratch MINERAL dial window Perfect for all kinds of sports, indoor/ outdoor activities and daily use. NOT SUITABLE for shower, bath or swimming Press &#034;Mode&#034; once, it will become a &#034;stop watch&#034;. Then press &#034;Adjust&#034; and &#034;Conversion&#034; to start, stop and reset it. Press &#034;Mode&#034; twice, it will become a &#034;alarm&#034;. Then press &#034;Adjust&#034; and &#034;Conversion&#034; to set. Press &#034;Mode&#034; 3 times, you can reset the time and date. Then press &#034;Adjust&#034; and &#034;Conversion&#034; to set. Press and hold &#034;Conversion&#034; then press &#034;Adjust&#034; to turn on/off daily alarm. Press and hold &#034;Conversion&#034; then press &#034;Mode&#034; to turn on/off hourly chime. Analog Digital dual time zone 12/24Hr military time Alarm Stopwatch Day-Date-Month Backlight Japanese quartz movement Stainless Steel watch back and buckle Anti-Scratch mineral dial window Flexible silicone band Case diameter: 51mm Case thickness: 16mm Item weight: 176g 51mm big watch face, not suitable for small wrist Perfect for all kinds of sports, indoor/ outdoor activities and daily use. NOT SUITABLE for shower, bath or swimming.