The AF540FGZ II has wireless master and slave TTL capabilities with access to 4 channels. It utilizes an optical pulse to transmit information and trigger flash units up to 13.1' away. Also, this unit can be set as a master, control, or slave unit and has access to a contrast control sync setting that enables the adjustment of the output of multiple flashes from a single unit.

An added feature for this flash is a constant LED light with 5 output settings for use during video, as an AF assist light, or as simply another light for your subject. Other settings include a multi-flash mode for stroboscopic photography as well as slow, high-speed, first and second curtain sync. Additionally, the AF540FGZ II runs on 4 AA batteries with a recycle time of 2.6-26.2 seconds and it comes with a case and stand.

Creative control modes include first-curtain sync, second-curtain sync, high-speed sync, and contrast control

Rotates from 180° right to 135° left with a lock at 0° and click stops
Right: 180°, 150°, 120°, 90°, 60°, and 30°
Left: 135°, 90°, 60°, and 30°

Tilts from +90° to -10° with stops at +90°, +75°, +60°, 45°, 30°, 0°, and -10°

Recycle time: NiMH/3 sec - Alkaline & Lithium/5 sec

Flash head automatically controls zoom from 24mm-85mm (full-frame) with compatible cameras and autofocus lenses

Wide-angle panel pulls out of flash head to expand coverage to a 20mm angle of view in full-frame format

Multi-flash mode for up to 100 flashes

Effective range of 2.6-26.2'

AF-assist beam for focusing under low light or low-contrast conditions

Daylight balanced flash for use outside without the need for gels or filters

Auto power off after 3 minutes of non-operation or after 1 hour while in wireless mode

LCD panel is backlit for use in poor lighting conditions

Runs on 4 alkaline, lithium, or Ni-MH AA batteries