Check the listing for details. Speedotron Model D400 Photography Flash Power Supply Untested. Condition: Used. Listed at 49.95 USD. The Speedotron Model D400 Photography Flash Power Supply is a reliable and durable power supply designed specifically for photographers using Speedotron flash heads. This untested unit provides a consistent and stable power source for your flash equipment, ensuring optimal performance during your photography sessions. With its focus on quality and compatibility with Speedotron products, this power supply is a valuable addition to any photography studio. Comes with power cord, see photos for condition. Manual included. - UNTESTED