GN 116. For use with EOS cameras, introduced with 650 and 620. A-TTL and TTL auto flash modes, variable power manual flash (down to 1/32 power), bounce, swivel and zoom head, rapid fire flash capability, second curtain sync, flash ready light, AF auxiliary light to assure sharp AF even in darkness, Save Energy function, auto internal zoom matches matches lens in use (24mm - 80mm coverage). LCD panel, stroboscopic effect up to 5 flashes per second. Batteries: 4- AA, NiCad OK.