Yongnuo YN560-III-USA Speedlite Flash with Integrated 2.4-GHz Receiver for Canon, Nikon, Pentax, Olympus, GN58, US Warranty (Black) Built-in wireless RF receiver compatible with manual RF triggers such as Yongnuo RF-603 and RF-602 Rear curtain sync for creative control of your subject"s light and motion blur LCD panel for full information about exposure settings PC port and external battery pack port for rugged, professional use Returns and service promptly performed in the USA for orders that are sold by and shipped from Amazon.com (must provide Amazon invoice copy for return authorization)