Power ON/OFF, switching between TTL and manual, TTL and TTL exposure compensation (from +2 to - 2 with in 1/3 increments) are controlled from the housing.
Accessory connector (supplied with the converter) is fixed in the accessory port.
LED showing battery charge remaining is situated alongside the viewfinder on the rear of the housing.
4 mode strobe selection switches (for Left and Right) are located inside the housing.
Battery box (for CR2 lithium battery) is situated inside the housing.
Compatible strobes : YS-D1, YS-110 Alpha, YS-110, YS-250, YS-120 and YS-60/90.