The S0 In-Ear Monitor Belt-Pack is ideal for personal monitoring applications. Made for musicians who tend to
be in fixed positions on-stage, like drummers and keyboard players, the S0 is a simple solution to hearing your
own performance and is incredibly easy to use. A quality volume control allows users to set precise volume
levels every time. The XLR input features a intuitive locking mechanism and there is also a 3.5mm jack
headphones connector.
Note:It is just a level control. You'll still need a headphone amp to drive your monitors.You need to feed it with a headphone amplifier, could be the one on your mixer, or outboard.

XLR pin 1 is connected to the 1/4" plug sleeve, XLR pin 2 is connected to the 1/4" plug tip, XLR pin 3 is connected to the 1/4" plug ring. 1/4 TRS to XLR Manle cable not include

SPECIFICATIONS
Input : XLR, stereo (XLR pin 1 is connected to the 1/4" plug sleeve, XLR pin 2 is connected to the 1/4" plug tip, XLR pin 3 is connected to the 1/4" plug ring.)
Output : 3.5 mm jack, stereo
Maximum power : 100 mW
Headphone impedance : 32-600 Ohm
Dimensions : 30 x 30 x 90 mm
Power : Passive
Weight : 80g