New Men's Watch GOLDEN HOUR Brand Fashion Sports Watches Mens Military Waterproof Quartz Wristwatch Introduction: Case Material: Stainless Steel Case Diameter: 50mm Case Thickness: 17mm Band Material: Silicone Strap Band Length (includes Case): 260mm Band Width: 26mm Function Introduction: Q1:How to use back light function: :Press Button A send out balck light for 3 seconds. Q2:How to use the stopwatch(1/100second) :Stay the stopwatch interface; Start and stop with button C; Press button D to resert stopwatch to zero; Press button B back to standard time display. Q3:How to use the alarm and hourly alarms ON/OFF Step 1: Standard time display: Press B twice to enter alarm mode; Press D to switch mode:Hour to Minute; Adjusting with button C; Press button B back to standard time display. Step 2: Stay standard time display; Press D once to alarm symbol(ALM) ON; Press D twice to Hourly alarm symbol(SIG) On; press D 3 times to (ALM) and (SIG) ON; Press D 4 times to (ALM) and (SIG) OFF. Q4: How to adjust time, date, week Step 1: Stay standard time display: Press B 2 times to enter, the seconds will flash; Press C to reset seconds t zero; Press D for setting, Minute-Hour-Month-Date-week; Press C to change interval of time being adjusted. Step 2: Press B back to standard time display. Q5: How to use the 12/24 hour switch Step 1: Stay standard time display: Press B 2 times to enter, the seconds will flash; Press D twice to enter, the hour will be flash; Press C to change interval of time being adjusted. Attention: When using the 12 hour format, the PM logo will be only displayed from 12 PM to 11:59 PM. Will include Golden Hour Guarantee Card. Brand New in Original Case.