What's in the box:

Personals Ear Monitor Headphone Amplifier In-ear Monitoring System Noiseless Earphone Amplifier In-ear Monitoring System for Stage and Studios (Standard)

This is a personals ear monitor headset amplifier that can be used in stage or studio, providing flexible and convenient personals monitoring solution for performers and recording artists.

Features:
This is a portable headphone amplifier that features fashionable appearance, big powers and fine quality voice output.
Being able to be connected with computer, mobiles phones and other 3.5mm audio devices for improving sound quality.
Fashionable mini appearance, it is light, portable and easy to carry anywhere.
Provides amplification and independent volumes control for up to four headphones.
Perfect circuit design ensures fine sound quality and stable performance.

Specifications:
Input interface: stereo 3.5mm TRS interface, stereo AV interface
Input impedance: 22K ohm
Input signal level: + 22dB
Output interface: Stereo 14 "TRS interface Stereo 3.5mm TRS interface
Output impedance: minimum 16 ohm
Maximum gain: 19dB/channel
Signal-to-noise ratio: > 98dB
Powers supply: AC5V, external powers adapter
Material: plastic
Item size: 140 * 96 * 30mm / 5.5 * 3.8 * 1.2in
Item weight: 450g / 1.0lb
Package size: 245 * 135 * 60mm / 9.6 * 5.3 * 2.4in
Package weight: 550g / 1.2lb

Packing List:
1 * Ear Monitor
1 * USB Cable