Specification 

• Yongnuo CA-63YN-560TXC YN560-TX Wireless Flash Controller and
  Commander for YN-560III YN-560TX YN560TX Speedlight for
  Canon DSLR Cameras
• Adjust flash function though the controller directly. Wireless triggering function.
  Set group, up to 6 groups. Set the flash output and flash mode. Modify multi flash frequency and count.
  Modify zoom for each group. Compatible with RF602 / RF603 / RF603 II. Transmission Range: 100 Meters.
  Support Wireless Shutter Receiver of RF603 / RF603 II. Large and clear screen, user friendly interface.
  Powered by two AA batteries. (not included) Suit for Canon DSLR camera.
• This controller only can directly use with YN-560III flash.
  Other Speedlite must work with RF602 or RF603 or RF603 II receiver.
  Specifications:
  Type: Wireless controller
  Distance: 100 m
  Channel: 16
  Flash mode: M / Multi Group control: A / B / C / D / E / F
  Zoom range: 24-105 mm
  Shutter interface: 2.5 mm
  Battery: 2 * AA batteries (NOT included)
  Item size: Approx. 9.1 * 7 * 4.3cm / 3.6 * 2.8 * 1.7 in
  Item weight: 97 g / 3.42 oz.