USB Charger + Long Lasting Battery: The digital alarm clock is powered by USB cable. Once fully charged, it can be used for 180 days, can be used for a long time, durable, cute in size and lightweight. Convenient to take with you when traveling. Quiet. no ticking noise to bother you when you fall asleep on a quiet night. TEMPERATURE DISPLAY + ℃/F° MODE --- Digital clock with built-in thermometer function, which can monitor indoor temperature to protect your health and that of your family. ℃/F° 2 kinds of display modes, one key switch. DATE DISPLAY + 12/24H MODE --- The alarm clock is equipped with date function which can display month and day; 12/24H two display modes, you can freely switch according to your personal reading habits. SNOOZE MODE + TOP BUTTON --- The SNOOZE button of the electronic clock is on the top of the alarm clock, you can easily turn it off without opening your eyes, giving you 5 minutes of lazy sleep. SMART NIGHT LIGHT --- Digital alarm clock with built-in light sensor. When the LCD watch is placed in a dark environment, it will emit soft light so that you can easily read the time, but it will not disturb your sleep. Variable Ringtone --- The alarm clock sound mirror lasts 60 seconds, and the sound and frequency are gradually increased, the wake-up effect is better, which is very suitable for heavy sleepers.