Profoto 100501 RFi Speedring Adapter Profoto (Black) Anton Bauer The VT-737SP from Avalon is

The VT-737SP from Avalon is a single-channel

A smart LED indicator on the DragonFly shows the sample rate and status of the incoming signal

5mm stereo headphone jack for zero-latency monitoring

submersible design is corrosion and impact resistant Custom-cut foam creates a perfect fit for your gear Ultra-stable continuous molded-in hinge and a patented trigger-release latch system Comfortable

And this filter allows you to decrease the effective ISO of high speed film (above ISO 400) so it can be used outdoors in bright situations

Profoto 100501 RFi Speedring Adapter Profoto (Black) Anton Bauer The VT-737SP from Avalon isThe Profoto Speedring Adapter for Profoto Flash Heads is designed to rotate 360 degrees for maximum creative flexibility. The speedring features heat resistant painted, color coded softbox pole sockets for quick assembly. It will fit both four and eight sided RFi softboxes, each of which have color coded poles to match the speedring.