Features: Adopts li-ion battery power supply design, ultra-fast charging recycle system. –Equipped with a 1800mAh rechargeable li-ion battery, recycle time is only 1.5s, and flash firing times of full outputs is over 700. Supports radio transmission master control, and can realizes 6-group flash control function easily. –As a master unit, YN860Li supports remote control of flash mode, flash output, focal length, stroboscopic times and stroboscopic frequency of YN860Li/YN560III/YN560IV/YN660/YN968N. Supports radio transmission slave function. –As a slave unit, YN860Li can receive the control and trigger signal from YN860Li/YN560IV/UN660/YN560-TX(II)/RF603(II)/RF605/RF-602, and realizes M/Multi flash. High guide number, and supports manual zoom function and S1, S2 optical slave mode. –GN60@IOS100, 200mmm; you can set flash coverage in the range of 24-200mm manually; supports S1, S2 preflash avoidance optical trigger modes. Supports USB firmware upgrade. –Equipped with USB interface, you can download the latest firmware from YONGNUO official website to upgrade the speedlite. With large-size LCD display, standard PC port and sound prompt system, and supports auto-save setting, custom functions setting(C.Fn).