-GN60 (m ISO 100, @200mm). Adjust from 1/1 to 1/128 in 1/3rd stops. -Built-in 2.4G wireless transmission to support transmitting and receiving. -High speed sync, wireless remote control, multi flash and manual focus assist. -Stable consistency and color temperature with good even lighting. -It can be compatible with most brands cameras with standard hot shoe, such as for Canon, for Nikon, for Pentax, for Olympus, etc.