Type Shoe mount.
TTL Dedication when used on R8/9 & M6 TTL/M7.
Guide Number 65' at 35mm/19.8 mm.
Auto Distance: 23'/7.0 m/11' 3.4 m/5.7'/1.7 m.
Zoom Range Diffusers for Tele 85mm and wide angle 24-85 included.
Auto Settings f/2.0, 2.8, 4.0, 5.6 8.0 & 11.
Angle of Coverage 28° (85mm) with tele diffuser/ 63°35mm lens in 35mm format/ 84° (24mm) with wideangle diffuser.
Recycle Time 5 Seconds with fresh batteries.
Two 3-Volt CR123A lithium batteries.
Dimensions (WxHxD) 2.6 x 4.3 x 1.6" -66x109x41mm
Weight 6.3oz / 180g