EACHSHOT MK-300 MK300 LCD i-TTL TTL Speedlite Flash Light For Panasonic GH3 G5 GX1 GF3 G3 GH2 G2 GF2 G1 GF1 G10 and Olympus Leica cameras Guide Number: 32 meters (ISO100, 105mm) Flash mode: TTL, M, RPT