The Behringer Micropower PS400 is an ultra compact phantom power supply designed for microphones. It is suitable for powering condenser microphones that require phantom power for operation. Its compact size makes it easy to transport and use in various audio setups. The unit is supplied complete with the original plug.
This is not the cheapest phantom power supply on the market, but reviews on the lower cost ones seem to suggest that they introduce some noise to the signal. This one is transparent and noiseless - which is exactly what you want in a power supply.