EACHSHOT Debao ST-E2 Canon Wireless Speedlight Commander / Flash Trigger by EACHSHOT Provides wireless control up to 35m. Built-in AF assists illuminator for critical focus in low-light situations. Controls an unlimited number of Speedlights for up to three groups. Support E-TTL (ALL)E-TTL( A:B)E-TTL (A:B+C)M (ALL)M (A+ B)M (A+B+C)RPT(ALL) Functions as a wireless commander for the Canon Speedlight units.