You are bidding on an AKG A-48V, 48 volt converter for the AKG B-18 phantom power supply.Many condenser microphones run on various voltages from 18 to 48 volts.But some run exclusively on 48 volts.This converter fits inside the B-18 and converts the 18 volts to 48 volts.This unit is extremely rare because outrageously expensive.Most stores didn't stock this converter.Retail price was $189 CAD !!! This is NEW old es with manual and all original packaging. I will accept Paypal only. Canadian bidders pay applicable taxes, please wait for my invoice .Shipping to Canada will be $8 US.To the US, $9 US.Anywhere else $11 US.I will combine shipping on multiple items.Good luck !