Specification:Circuit Design: Insulated Gate Bipolar Transistor(IGBT)Guide No.: 60(ISO 100,200mm)Flash Model: ETTL, M, Multi, GrTrigger Mode: set-top mode, radio wireless master mode, radio wireless slave mode, optical slave mode, S1, S2Zoom: Auto,20, 24, 28, 35, 50, 70, 80, 105, 200mmVertical Rotation Angle: -7 to 150 degreesHorizontal Rotation Angle: 0-360 degreesPower Supply: 1 * 11.1V 1800mAh Li-ion Battery(included)Flash Times: 700 timesRecycle Time: Approx. 1.5sColor Temperature: 5600KFlash Time: 1/200s to 1/20000sFlash Control: 8 level of output control(1/128-1/1), 29 levels of fine tuningExternal Interface: Hot Shoe, USB Port, PC portTransmission Distance: 20-25m indoors, 10-15m outdoors for optical triggering, up to 100m for radio triggeringAdditional Functions: second-curtain sync, FEC, FEB, sound prompt, automatically saving setting, power saving mode, overheat protection, custom functions(C.Fn)Item Size: 20.6 * 7.5 * 5.6cm/ 8.1 * 3 * 2.2in(extended state)Item Weight: 445g/ 15.7ozPackage Size: 22.4 * 15.6 * 8.9cm/ 8.8 * 6.1 * 3.5inPackage Weight: 950g/ 2.1lbs Features:Adopts lithium battery power supply design, ultra-fast charging recycle system.--Equipped with 1800mAh Lithium battery, recycle time is only 1.5s, and over 700 flash firing times of full output.Can be used as a master/slave unit and supports radio wireless flash function.--When YN862C is set as the master unit, it can control YN862C (slave mode), YN622C II (560RX mode) and other controlled units to achieve ETTL/M/Multi flash, high-speed synchronization and other functions. When YN862C is set as a slave unit, it can receive the control and trigger signals of the TTL master unit such as YN862C and YN560-TX Pro to realize the ETTL/M/Multi mode off-camera flash; it can receive control and trigger signals of YN560-TX (II)/RF603/RF605, achieve M/Multi mode flashHigh guide number and supports high-speed sync.--GN60@IS0100, 200mm, supports high-speed sync, ETTL, manual flash, multi flash, Gr grouping flash, and the highest synchronous speed can reach 1/8000s.Support Auto/Manual zooming and wireless optical slave function.The YN862C supports auto and manual zooming, the flash coverage can be changed between AUTO, 20-200mm; The YN862C supports receiving YONGNUO, C's and wireless optical master signal, supports S1 and S2 flash mode.Supports USB Firmware Upgrade.--The YN862C equipped with the USB interface, supports firmware upgrade. The users can download the upgrade firmware through the Yongnuo official website to upgrade the flash.