Specification: Type: Digital Projection Clock Material: ABS Plastic Shell Color: Black / White Shell Words Color: White Display Interface Colors: Mirror Interface Brightness Adjustment: Automatically or Manual Brightness Level: Two Levels Optimal Projection Range: 2~3m / 6.6~10ft Projection: Can be Rotated 180 Temperature: -10~50 / 14F~122F Time Format: 12 / 24 Hour Switchable Snooze Duration: 5-60 Minutes Temperature Mode: / F USB Charging Port: DC 5V Product Size: 18.7 x 9 x 4.2cm / 7.36 x 3.54 x 1.65inPackage Included: 1PCS X Digital Clock 1PCS X USB CableNote: Some scratches appear on the protective film due to long-distance transportationplease tear the protective film off before using. (Tips: As our protective film is very thin and fit well, which requires a little patience to find it and tear off . ) The clock has a built-in button battery. it just could keep time memory when power off, couldn't support the digital clock light up. Saving your time to adjust the display time.