It's a fill light, 2500-6500K and brightness both adjustable, built-in diffuser, Also a mini speedlite, around 6500K. Support to flash when by smartphone. Charge by type-C cable, compatible with most mirrorless cameras. Instructions: 1. Long the power button for more than 3 seconds to turn on or off the lights. If not used for a long time, please turn off the power, avoid light, and store in a dry place. 2. It has two lighting modes: Bi-Color fill light mode, Flash mode. After turning on, short the power button to switch between two modes. Bi-Color fill light mode: 1. Long the power button to start. If both brightness and color temperature lights are on with the front LED panel, it's in Bi-color fill light mode. Otherwise, switch by short pressing the power button. 2. Adjust lighting color temperature and brightness for p os or videos. Use it handheld, attach to the camera's shoe, or use a cold shoe device. Flash mode for camera: 1. After starting, if only the brightness light is on, it's in flash mode. Otherwise, switch by short pressing the power button. 2. Test the flash when the button lights up red and the capacitor is fully . Face the light away from you. 3. Install onto the camera's shoe, lock the knob, and long the power button to activate the flash. Set the camera to M mode for accurate exposure. 4. Flash does not support automatic exposure (TTL). Sync with shutter to 1/250. Adjust power using the D button. 5. Designed for most cameras. Some may need additional settings. Flash mode for Smartphone: 1. it's in flash mode. Long the p ography button and turn on your phone's b1uet00th. Scan for "" and pair. 2. Blue light flashing means searching. Steady blue light indicates successful connection. 3. Open camera mode, aim, the p ography button to flash and take a p o. 4. Use LED lights for . Avoid blocking the light panel. The p ography button can also control video recording. 5. Long the p ograph