Canon 430EX III RT Speedlite
GN43, dedicated with all EOS and Canon digitals
Canon EL-100 Speedlite
Wireless slave capability , manual zoom head, E-TTL II, E-TTL, TTL
Kenro KF101 Flashgun
GN58, dedicated with most Canon/Nikon compatibility
Nikon SB-500 Speedlight
GN24, auto fill flash, 4 stage tilt head, Built-in LED light for movies