Audioroot Femto - Battery powered stereo mic preamp with 48V phantom power - Nordic Pro Audio ApS
Xvive P1 Phantom Power Supply 48V/12V Switch,Up to 40 Hours of Use,Rechargeable Portable Phantom Power for Condenser/Shotgun Microphones, Mic Preamp, Recording Studios
Rolls MP13 Mini-Mic Preamp with Phantom Power 675889000139 | eBay