Multi-function alarm clock: hour repeat, snooze, hour switching, energy-saving mode can be selected, LED large screen display. Can be connected with USB cable. Energy-saving mode: automatically enter energy-saving mode when using battery. Only when the surrounding sound exceeds 80DB, you can wake up the alarm clock and light up the clock for 6 seconds. The time display is always on. Snooze function: the big snooze button can be blindly pressed while sleeping. The clock sounds for 1min every time, lasting for 2 hours, and the delay time is 5 minutes each time. Support USB charging and battery power supply. And the voice control mode will be turned on under battery power(not work on USB mode), and the alarm clock will remain on constantly under USB charging. Item Name: Alarm Clock Power Supply: USB Cable or 4 x AAA Battery (Not Included) Features: Voice Control, Big LED Display, Snooze Function Size: 12.5cm x 7.5cm x 4.5cm/4.92" x 2.95" x 1.77" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Alarm Clock 1 x USB Cable 1 x User Manual