Setting: Press and hold the SET button for three seconds to enter the settings: Enter 12/24 hour adjustment and press the UP / DOWN button to switch. Press UP / DOWN to adjust, press UP / DOWN to adjust, press UP / DOWN to scroll forward or backward; Press the SET button to set the time and date at the same time. Press the SET button to turn off the alarm clock when the set enters the alarm clock, the specified operation is adjustable simultaneously. Press the SET button to adjust the alarm and adjust the operation at the same time. Product description: Product name: Digital 3D Wall Clock. Weight: about 190 grams. Size: 235 mm * 93 mm * 18 mm Material: Acrylic Temperature range: 0-50 (32-122 ) Color: Black, White Light: Blue light, white light. Red light, pink right, green light attachment: Use the user guide, USB power cord. Power supply: USB Output voltage: DC 5 V. Input voltage: 100-240 V. The package contains: 1 * LED wall clock (without battery) 1 * USB power plug 1 * User manual