Display: • Analog-Digital dual time display • 12/24Hr military time • Luminous hands Function: • Alarm • Stopwatch • Day-Date-Month • Backlight • 30M water resistant Material: • Japanese quartz movement • Aluminum alloy watch case • Stainless Steel watch back and buckle • Anti-Scratch mineral dial window • Stainless steel band Size/Weight: • Case diameter: 46mm • Case thickness: 15mm • Item weight: 158g Tips: • Glow-in-the-dark function is available after watch hands being exposed to strong light for a while. • 30M water resistant is perfect for all kinds of sports, indoor/outdoor activities and daily use. NOT SUITABLE for shower, bath or swimming. Instruction: There are 4 buttons on the watch: • Left top = Light, for light up the background • Left bottom = Mode, for choose mode • Right top = Start, for start or stop chronograph, and for setting time or alarm • Right bottom = Reset, for reset the chronograph, and choose date that it's need to be set. 1. Press "Mode" 1 time, it will become a "stop watch", press "Start" and "Reset" to start, stop and reset it. 2. Press "Mode" 2 time, it will become a "alarm", press "Start" and "Reset" to set time and choose data. Press "Mode" to confirm after you complete setting. Press "Start" and "Reset" at the same to cancel alarm. 3. Press "Mode" 3 time, you can reset the time and date. Press "Start" and "Reset" to set time and choose date. Press "Mode" to confirm after you complete setting.Puguntasri