Features:-YN900 is equipped with multi channel wireless remote controller which is used to adjust the luminous intensity & control the switch of YN900.-A mobile APP is provided on YONGNUO official website: With this mobile APP, you can control this LED video light with your mobile phone, read the current parameter of the luminous intensity & channel, & control the luminous intensity & the switches of 8 groups of video lights individually.-YN900 adopts 900 high quality LED lamp beads with chips of extra-large luminous area. In the same energy consumption, the luminous intensity is greater, the facular is more uniform & the service life is longer.-YN900 adopts YONGNUO proprietary LED driving technology which does great help to effectively avoid corrugation & stroboscopic flash.-YN900 adopts encoder digital dimming system, including coarse tuning mode & fine tuning mode.-On the LED digital display screen of YN900, the parameter of the power output is intuitional.-Shooting for long time is possible because YN900 supports external DC power input (power adapter is optional).-The fan forced heat dissipation YN900 adopts solves the heating problem after the long use of LED video light.-YN900, equipped with 2 pieces of color temperature filters, can be used under different circumstances. Compatible battery: For Sony NP-F series (Battery not included)NP-F750 NP-F550 NP-F530 NP-F970 NP-F330 NP-F950 NP-F570 NP-F770 NP-F960 NP-F930 NP-F930/B NP-F970/B