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/DatePower Supply:USB Type-C 5V DC (ports on back/right side)Operating Current:200mA. Sync Range:2m from window recommendedDisplay Modes:Time only / Date only / Alternating cycleDimensions:Not specified (display size: 2.3 inch)Functional Operation:SET ButtonEnters setting mode (YearMonthDateHourMinuteSecond)Flashing values adjusted with +/- buttonsNote: Satellite sync eliminates manual adjustments+ ButtonCycles display modes:dP:0 Continuous time displaydP:1 Continuous date displaydP:2 Time/Date alternating- Button (Advanced Settings)Code Function RangeLP Brightness Level 1 (dim) to 8 (bright)AL Auto-Brightness 0=Off / 1=OnBP Alarm Sound 0=Mute / 1=EnableEE Time Zone 8=Beijing Time (GMT+8)FF Time Format 12=12-hour / 24=24-hourALARM ButtonSets 3 alarms (indicated by -1-, -2-, -3-)Pro Tip: Set all alarms to same time for single daily alarm30-second duration ( any key to snooze)Usage NotesPlacement: Position 2m from window for satellite receptionBrightness: Manual adjustment (LP) requires AL=0 settingTime Zone: Effective after successful satellite sync (SYNC LED active)Alarm: Audible alert requires BP=1 settingKey Advantages-grade precision - Maintains millisecond accuracy via satelliteSmart light sensing - Eliminates nighttime glareGlobal compatibility - Works with GPS (worldwide) and BeiDou (Asia-Pacific)Zero-configuration - Fully automatic time synchronizationColor: BlackMaterial: plasticPackage Contents:1 x GPS ClockOnly the above package content, other products are not included.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.