Features 1APPLICABLE PEOPLE: USB alarm clock has a large screen digital display, which is suitable for children, teenagers, adults and the elderly. 2APPLICATION: LED digital alarm clock can adjust brightness and volume, and is suitable for bedroom bedside table, desk, etc. 3ALARM CLOCK FUNCTION: LED digital clock has additional alarm clock function, which can help you avoid missing any important meetings or appointments. 4PRACTICAL GIFT: LED alarm clock has a 12/24 hour mode and is a good gift for Christmas, New Year or birthday. 5POWER SUPPLY: Digital alarm clock can be charged by USB or powered by battery, which is very convenient. Don't worry about the alarm clock running out of power. Specification Item Type: Digital Alarm Clock Material: ABS Battery Type: 4 x AAA Batteries ( Shipped Without Batteries) Size: Approx. 6.6x12.45x3.56cm / 2.6x4.9x1.4in Gross Weight: 162g/5.7oz Package List 1 x Digital Alarm Clock (Batteries Not Included) 1 x English Manual 1 x USB Data Cable Note All data are measured manually, and there are certain errors in the measurement results.