Features: A upgrade version based on YN560TX II, with TTL/ high speed sync functions, its radio protocol achieves cross-brand compatibility. Compatible with S' camera. Can trigger multiple YONGNUO's flash models, such as YN862C/YN968C/YN968N/YN200/YN560III IV/ YN860Li/YN720/YN660/YN685/YN622C II/ RF605, etc 16 channels, up to 10,000 customizable photographer ID, A/B/C/D/E 5 flash groupsFully supports TTL/ M/ Multi/ GR flash mode. Supports front-curtain sync, second curtain sync(M mode)Supports remote control focal settings of slave unit flash (only for YONGNUO compatible flashes). Supports TTL ratio, flash exposure compensation, flash exposure Lock, flash exposure bracketing, modeling flash functions. 2.4G radio Maximum communication distance is over 100m; Firmware can be upgraded via USB(Micro-USB); High resolution dot-matrix LCD, backlight for keys. Specifications: : YONGNUO Model: YN560-TX II/S Channel: CH 1-16 ID: 0000-9999 Slave unit control: Up to 5 groups (A/B/C/D/E) Transmission distance: Approx. 100 m FEC: 3 stops in 1/3-increments High-speed sync: 1/8000s Manual flash: 1/1 - 1/128 power (1/3-stop increments) Stroboscopic flash: Provided (1 - 500 Hz) AF assist Beam Emitter: Provided Power source: 2 AA/LR6 alkaline batteries/ Ni-MH batteries(not included) Weight: Approx. 110g (excluding batteries) Packing List: 1 * Flash Trigger 1 * Bottom Cover 1 * Storage Bag 1 * Users Manual(English & Chinese)