With ON or OFF switch, color temperature adjustment, and brightness adjustment knob Three color adjustment (warm light, white light, soft light), provides more natural light for different skin tones and environments A phone or tablet with a length or width of 11.5-18.5cm can be mounted on this clamp holder Widely used in portraiture, makeup, YouTube video, studio shooting, vlogging, portrait photography and live streaming, etc. Specification: Light ring size: 26cm Material: ABSandPC Number of lamp beads: 120 Power: 10W Color temperature: 3000-6000K three colors and stepless dimming Lumen: 1000lm Color rendering index Ra: 90and Power supply mode: USB cable, 2m Tripod stand height: 120cm, stretchable and retractable Retractable length: 39cm Tripod material: Metal The clamp can be stretched: 12-19cm, universal for most tablet models and phone models