Built-in Alarm : No Built-In Radio : No Brand : Other Type : Desk Shelf Clocks Display Type : Digital Material : Plastic Battery Size (Form) : Electricity Features: Multi-function big LED alarm clock, rectangular 12/24 hour system switchover Three-dimensional digital clock Simple, practical and fashionable Snooze time setting: 5-60 minutes (the default interval is 5 minutes) Built-in CR2032 button battery to ensure punctual timing Power: 5V AC adapter (Not include), CR2032 button battery (Not include) for settings back up, USB cable (include) Time Setting Press and hold the MODE button for 3 seconds to enter time mode Press UP or DOWN buttons to adjust hours Press the MODE button again to set the minute by using the UP or DOWN button Press the MODE button again to exit the time mode Alarm Setting Press the MODE button when AL icon flashes, the alarm setting can be started. Hold Press MODE button for 3 seconds, use UP or DOWN bottom to set the desired hours, minutes (the default interval is 5 minutes, you can adjust your desired snooze time from 5 to 60 minutes) Press MODE again to exit the setup mode. Night Mode Setting Press MODE twice, then press UP or DOWN bottom to turn on/off the night mode The default night mode is between 18:00 and 6:00.