Although I've opened the package, it's practically unused, but it is a new item. 【Manufacturer's Warranty】This product comes with a one-year warranty from the Zhiyun official flagship store from the date of purchase. Friendly customer service is available if you encounter any problems during use. Note: To avoid accidental power-on, when using the CX100 video light, first briefly press the power button. The indicator light will then illuminate. Next, immediately long-press the power button, and one indicator light will blink. Finally, immediately turn the brightness adjustment dial to turn on the power. 【Caution】To charge the CX100 video light, you must use a USB adapter that supports the PD fast charging standard. Charging in the shutdown state is recommended. When shut down, you can use the standard USB Type-C data cable (60W) and a USB adapter (of your own) that supports the PD fast charging standard to charge the CX100 video light. When using while charging, the USB adapter will first supply power to the CX100 video light, and the remaining power will be used to charge the battery. The battery's charging output supports a maximum of 30W, and it is recommended to use a USB adapter and USB data cable with an output of 100W or more. If the charger's output is less than 100W, the light will not reach its maximum brightness while in use. After using the light for a certain period and reaching a stable state, the fan will start to rotate for cooling. 【Lightweight Design, 100W Light Efficiency】The CINEPEER CX100 adopts a thin and flat design, compressing a video light with a 100W point light source into the size of your palm, easily meeting the needs of convenient outings and professional light supplementation with a single video light. 【Built-in 4500mAh Battery, PD/DC Power Supply】The CX100 comes with a built-in battery, allowing you to use it directly for light supplementation, with a runtime of 30 minutes at full power. It supports DC direct power supply and PD protocol Type-C fast charging power supply, and can be used in combination with a mobile power supply or adapter of the relevant protocol to ensure full power high-energy output at any time. 【Smallest Size, Excellent Heat Dissipation】Even within such a compact structure, a fan and custom heat sink are integrated, significantly improving efficiency, making the lamp body lighter, and the output more stable.