Dimming is variable, and while you can make adjustments locally on the fixture, the YN9000 has a built-in eight-group receiver that can accept signals that control the light's functions wirelessly with the included remote at distances up to up to 49'. There is also a free, downloadable app that lets you control the fixture with a smartphone. The light can run on AC power via an optional adapter or on separately purchased NP-F batteries. * Integrated metal structure Adopts aluminum alloy lamp body frame, greatly improving the heat dissipation effect. * Equipped with a professional soft case, creating an additional studio lighting effect. *Wide-angle illumination Adopts an ultra-wide lamp panel with a diagonal diameter of 390mm, using 900pcs LED lamp beads with high CRI, high brightness, high precision and high reliability, thus creating a more powerful complementary lighting. * 360 degree adjustable lighting angle Equipped with a professional U-shaped bracket, 360 degree adjustable, which makes it easy to adjust the lighting angle, let you grasp every key filling angle. *Lamp Beads with High CRI Adopts 900 pcs of high brightness, High CRI LED lamp beads, long lifespan, the average RA is 95 or more, YN9000 can perfectly restore the true color of the object. *Remote Control Support mobile phone APP to remotely control the LED light, which can control switches and brightness of 8 groups of groups respectively, allowing you to control the LED light you want to meet photography needs easily . Split control for 8-group LED lights, which is more convenient for adjustment (Note: Standard equipped with LED wireless remote control and receiver) * Professional constant current technology * Adopts the driving technology of YONGNUO LED constant current, the light output is stable, which can effectively avoid the ripple, the photographic effect is more reliable. * Two power supply modes 1.Applicable battery: NP-F series lithium battery. 2.External DC power supply support long time use, the applicable voltage is: 19V 5A (This model is not equipped with an external power source, needs to be purchased separately). * Adopts Dual LED digital display, the display effect is more sterioscopic, and the power output is more intuitive. specification Color temperature: 5600K Luminance angle: 55 Color rendering index: greater than or equal to 95 Mobile phone Remote distance: 15 meters Input power: 65W Remote distance: 15 meters Lumen Value: 6975LM Weight: approx. 2700g Average life: 50000H Dimension: 410*75*410mm