1. Same Frequency Display: Time Month Day Week Temperature2. 12/24 Hour System Switching3. Celsius / Fahrenheit Switching .4. Calendar: 2000-2099. Usb-Powered Dc5v/500ma; Built-In Battery To Keep The Time Display Program Running Internally But Not Visible Time Setting5. In Time Display Mode, Press Set Key To Enter Setting Mode, The Sequence Is Year-Month-Day-Hour-Minute.6. Hour Setting:Press Set To Enter Hour Setting, Hour Zone Blinks, Press Up/Down To Increase/Decrease: After Hour Setting Is Complete, Press Set To Enter Minute Setting As Before.7. After Setting The Minutes, Press Set To Return To The Time Display Screen. C/F Switching, In Normal Display Mode, Press Up To Switch The Temperature Unit C/F, 12/24 Hour System Setting, Press Down To Switch The 12/24 Hour System.Precaution.Please Use The Clock In A Dry Place, Due To All The Casing, It Can Not Be Used For A Long Time In A Place Where It Is Wet, Trembling, High Temperature Or Keep The Temperature Change.Please Use The Usb Cable Suitable For The Clock.Note:Charging Model: 8000 Mah Lithium Battery, Use Time Is About 15-20 Days (6-8 Hours To Fully Charge)Please Press The "Reset" Button Before First Usetype:D: Solid wood color (storage type charging)Display Type: LEDProduct Power Supply: Built-In Lithium Battery (Built-In 8000mah Lithium Battery)Material:MPF+PVCSize:about 195 x 25mmPackage Contents:1 x Digital Clock1 x Chinese And English Manual1 x Usb Charging Cable