Expandable up to four lights: Daisy chain up to four total lights for more immersive lighting for video recording. Important note: Due to power delivery limitations of USB-A, we do not recommend powering more than two lights with a USB-C to USB-A adapter. Important notes: The light does not contain a battery. Power adapter not included. Must be plugged into a USB-C or USB-A port to function. USB-C to USB-A adapter included. You may need a USB wall adapter (not included) for full brightness if your USB-A port’s power delivery is low. Add-On light does not include power cable and only functions WITH a Single or Double light kit. The maximum space between connected lights is 9 inches. Preinstalled diffuser provides a soft light panel for a more natural glow and appearance. Look your best on a video call with a proper video conference lighting kit. Adjustable brightness and temperature. Includes cable clips and Velcro straps. Easy set up and removal: The monitor or laptop light sits on top of your screen with a webcam style stand. It is meant for stationary use and does not use unreliable suction cups or damaging adhesive just for a computer video light. Position your camera first then add the monitor lights. Webcam lighting for video conferencing provides a more professional appearance and streaming presence: Get the ideal video call light to match your skin tone and environment. Add a Zoom light to improve engagement over video meetings. Present your best with a HumanCentric video conference light, double light kit. Improve your computer light for video conferencing, Zoom calls, streaming video, and online class. Double light kit is two connected video lights with one power cable.