Doran L-1224 Light Tight Darkroom Louver for Pro-Lab Fans Hughes & Kettner You also get a sync

You also get a sync cord

A USB cable and downloads for Ableton Live Lite and Xpand

and is installed directly into the headset

International Operation Auto-switching internal power supply features power save mode

Doran L-1224 Light Tight Darkroom Louver for Pro-Lab Fans Hughes & Kettner You also get a syncEach Doran Light Tight Darkroom Louver is designed to supply just the right amount of air to a particular model exhaust fan. Note: exhaust fans work best in a darkroom equipped with fresh air supply louvers or some other kind of air supply. If there is no air supply to the darkroom the fan will be working against a vacuum and can do nothing.