INTRODUCTION
Thank you for choosing the Raya SDR-400 Alpha
Monolight. This all-in-one, fan-cooled 400w/s
monolight uses intelligent technology, creating a sleek,
compact, and easy to use flash unit. Constructed with
a high-quality rubberized polymer housing, the SDR-
400 is operated with a clearly marked digital control
panel, creating a simple and intuitive workflow for
controlling everything from power levels in one-tenth
stop increments to the built-in wireless receiver.
The durable SDR-400 has an integrated four-channel
wireless receiver that communicates with an included
wireless transmitter. You can easily change the
wireless frequency of the monolight with DIP switches.
Additionally, the monolight includes five individual
slave settings, ranging from a regular slave mode to
modes that will trigger the unit with external flashes
with up to three pre-flashes.
The Raya SDR-400 Alpha Monolight is equipped
with advanced protection circuit controls to prevent
