Best-mall Creative Sound Control Led Cloud Alarm Clock With Date,USB/Battery Power Supply,Always Display/Energy Saving Mode,Placed On The Desk Or Hung On The Wall Two Display Mode, Always Display and Energy Saving mode. you can switch them freedomly. When using Power adapter to supply power, it defaults Always Display Mode. When using Battery to supply power, It defaults Power saving mode.This cloud clock built-in Button Battery, When switching the power supply, You wont need to reset the time. Energy Saving mode means that the product only records the time and not display the time. Energy saving mode takes use of using battery to supply power and sleeping at night. There are 3 ways to activate the display. Voice Control, Gently Shake and Pat activation. Under Energy saving mode, the surrounding sounds up to 90 decibels, gently shake or beat the alarm when the alarm activation time display, automatically extinguished after 5 seconds Let the Snooze become simple. At the back of the cloud You can use to button to open the snooze alarm clock, The alarm sound continues for 5 minutes, until you press any button to turn off the alarm. Placed on the desktop or Hung On the wall as you like.