Dimensions: 14.5 cm x 6.5 cm x 3.2 cm 【Dual Alarm Snooze Function】The alarm clock has two separate alarm times. You can set two alarms in one day to plan your time effectively. The snooze function allows for an extra 5 minutes of sleep; simply press the snooze/light button located on the top of the clock. It will remain snoozed until you press another button. 【USB Charging and Built-in Battery】The alarm clock includes a USB charging cable for power (adapter not included) and a built-in rechargeable battery to save your clock settings in case of a power outage. (Caution: Please connect to the USB port or ONLY to a 5V/1A and 5V/2A adapter to charge the clock) 【Temperature Display and Adjustable Brightness】The digital alarm clock displays the temperature (°C). While charging, the LED screen remains on and automatically adjusts the brightness to 3 levels for different periods. It automatically adjusts to high brightness from 7:00 AM to 6:59 PM, medium brightness from 7:00 PM to 11:59 PM, and low brightness from 12:00 AM to 6:59 AM. Large LED digital display, clear and comfortable viewing experience. You can also adjust the brightness manually. 【Voice Control】The LED screen lights up when it detects a sound or when you press the "SNOOZE/LIGHT" button. Clap, tap on the table, tap, or make a sound louder than 90 dB to activate the smart alarm. The screen automatically turns off after 6 seconds. [10 Melodies & 4 Adjustable Volume Levels] This is a silent alarm clock with 10 different ringtones. You can hear and choose your preferred ringtone when setting the alarm time. Adjust the alarm volume by pressing the VOLUME button; it's easy to set. The time display supports both 12-hour and 24-hour formats.