Dual-Satellite Sync: Automatically receives GPS/BeiDou signals. Adaptive Brightness: Auto-dimming for day/night viewing. Triple Alarm System: settings for 3 alarms. Large Display: 2.3-inch high-visibility LED digits. Multi-Function Display: Time/Date<br> Power Supply:USB Type-C 5V DC (ports on back/right side)<br> Operating Current:200mA. Sync Range:2m from window recommended<br> Display Modes:Time only / Date only / Alternating cycle<br> Dimensions:Not specified (display size: 2.3 inch)<br> Functional Operation:<br> SET Button<br> Enters setting mode (YearMonthDateHourMinuteSecond)<br> Flashing values adjusted with +/- buttons<br> Note: Satellite sync eliminates manual adjustments<br> + Button<br> Cycles display modes:<br> dP:0 Continuous time display<br> dP:1 Continuous date display<br> dP:2 Time/Date alternating<br> - Button (Advanced Settings)<br> Code Function Range<br> LP Brightness Level 1 (dim) to 8 (bright)<br> AL Auto-Brightness 0=Off / 1=On<br> BP Alarm Sound 0=Mute / 1=Enable<br> EE Time Zone 8=Beijing Time (GMT+8)<br> FF Time Format 12=12-hour / 24=24-hour<br> ALARM Button<br> Sets 3 alarms (indicated by -1-, -2-, -3-)<br> Pro Tip: Set all alarms to same time for single daily alarm<br> 30-second duration ( any key to snooze)<br> Usage Notes<br> Placement: Position 2m from window for satellite reception<br> Brightness: Manual adjustment (LP) requires AL=0 setting<br> Time Zone: Effective after successful satellite sync (SYNC LED active)<br> Alarm: Audible alert requires BP=1 setting<br> Key Advantages<br> -grade precision - Maintains millisecond accuracy via satellite<br> Smart light sensing - Eliminates nighttime glare<br> Global compatibility - Works with GPS (worldwide) and BeiDou (Asia-Pacific)<br> Zero-configuration - Fully automatic time synchronization<br> Color: Black<br> Material: plastic<br> Package Contents:<br> 1 x GPS Clock<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.