YONGNUO YN900 Pro LED Video Light/LED Studio Lamp with 5500K Color Temperature and Adjustable brightness for the SLR Cameras Camcorders, like Canon Nikon Pentax Olympus Panasonic JVC etc. YN900 is equipped with multi channel wireless remote controller which is used to adjust the luminous intensity and control the switch of YN900. A mobile APP is provided on our official website, with this mobile APP, you can control this LED video light with your mobile phone. YN900 adopts YONGNUO proprietary LED driving technology which does great help to effectively avoid corrugation and stroboscopic flash. YN900 adopts encoder digital dimming system, including coarse tuning mode and fine tuning mode. Shooting for long time is possible because YN900 supports external DC power input (power adapter is optional).