What's in the box:

48V Phantom Power Supply Box for Condenser Microphone Studio Music Recording USB-Powered Operation (Standard)

Features:
48V phantom power supply for the signal condenser microphone, stable and reliable.
Built-in low pass filter circuit design can filter out interference noise; stable voltage doubler-rectifier can effectively filter out the signal interference.
With the balanced XLR input & output jacks to connect in-line with your condenser mic and mixer.
USB-powered operation, compact size and full metal shell, portable and durable.
With on-off switch and LED indicator for easy and safe operation.

Specifications:
Color: silver
Material: metal
Power Supply: DC 48V
Item Size: 9.6 * 8.8 * 4.8cm/ 3.78 * 3.46 * 1.89in
Item Weight: 217g / 7.65oz
Package Size: 18.2 * 12 * 7.2cm / 7.17 * 4.72 * 2.83in
Package Weight: 342g / 12.06oz

Note:
The microphone, mixer and connection cable showed in the pictures are not included.
Phantom power does not enhance the microphone sound quality and improve its volume.

Package List:
1 * phantom power
1 * USB cable