Expand your wireless flash system with this X1R-S TTL wireless receiver from Godox. This 2.4 GHz system is compatible with Sony cameras and flashes that support ADI / P-TTL for automatic exposure and metering, making it an excellent choice for photographers who need to work quickly. It also features an impressive range of 100 m and can be set to one of 32 channels to limit interference with other nearby systems. Another huge advantage is the ability to control up to five groups simultaneously or set the unit to flash ratio mode for three groups with different power levels relative to each other.