Works without cables. The battery can be charged quickly and easily via USB. It will offer up to 15 hours of autonomy in soft mode and 4 hours at full power. Provides 2 levels of very pleasant light intensity. A micro-USB port is hidden behind its red node to charge the battery. [Best Features]: Battery powered light, 15 hours of soft mode use, USB rechargeable, modern design, two brightness levels. The lamp head of this desk lamp is rotatable. Therefore, you can adjust the lighting angle according to your needs. The brightness of this table lamp is adjustable. You just have to twirl its tail. The light source of this desk lamp can be switched. All you have to do is press the bell on the desk lamp and quickly release it. This desk lamp has a built-in 1200 mHA rechargeable battery, which is safe and durable . The light is soft. It will not hurt your eyes and can be used for reading and studying.