The AK-X6f DC-Adaptor Cable from Ambient Recording is a Y-cable for an external power supply that can be used with the TC4032 and TC4042 Hydrophone portable recording system. It allows you to connect a 12-24 VDC portable power supply, such as the DV-SQN2S, DV-SQN4S, AkkuPak, V-PakII, (sold separately), to power the system. This Y-cable features an XLR6f end to a standard Hirose 4-pin male and an XLR3 male connector.