[Built-in battery clock]Built-in 1000 mAh rechargeable lithium battery, no need to be inserted to use, when fully , the maximum volume can be played continuously for about 6 hours, and the standby time is about 48 hours. Easily charge via USB cable, 2-3 hours to fully charge. [Three-level brightness]The electronic clock LED display has three brightness, you can choose the brightness freely, it is friendly to use at night and protect your eyes from being too irritating. [FM Radio & Bluetooth Speaker]High-quality Bluetooth 5.0 speaker for fast connection to all Bluetooth-enabled devices; Built-in FM radio with simple user interface, adjustable volume and clear sound. [Dual Alarm Clock]There are two alarm clocks that can be set and used separately. The alarm volume gradually increases to wake you up. This digital clock also supports 12/24 hour time format switching (double click "M"). [Dimming LED Display]This bluetooth speaker digital electronic alarm clock has an LED display, the time is clear at a glance. Colour:silver-white Material:plastic Size:116 x 51 x 33mm Package Contents: 1 x Digital Alarm Clock 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. [Built-in battery clock]Built-in 1000 mAh rechargeable lithium battery, no need to be inserted to use, when fully , the maximum volume can be played continuously for about 6 hours, and the standby time is about 48 hours. Easily charge via USB cable, 2-3 hours to fully charge. [Dimming LED Display]This bluetooth speaker digital electronic alarm clock has an LED display, the time is clear at a glance. [Dual Alarm Clock]There are two alarm clocks that can be set and used separately. The alarm volume gradually increases to wake you up. This digital clock also supports 12/24 hour time format switching (double click "M"). [FM Radio & Bluetooth Speaker]High-quality Bluetooth 5.0 speaker for fast connection to all Bluetooth-enabled devices; Built-in FM radio with simple user interface, adjustable volume and clear sound. [Three-level brightness]The electronic clock LED display has three brightness, you can choose the brightness freely, it is friendly to use at night and protect your eyes from being too irritating.