Donner EM1 Rechargeable Portable Personal in-Ear Monitor Amplifier Analog Headphone Amplifier Stereo Headphone Earphone Amp Volume Control Audio...

High Power - High power of headphone amplifier suited for high impedance professional headphone, make sure there is enough volume in noisy surroundings. (Don't support microphone). Professional In-ear Monitor - Outstanding technical, sonic characteristics, high audio reproduction and no audio rendering for professional personal in-ear monitor. Practical Interface - XLR and TRS input connector with locking mechanism, Stereo/mono source switch depending on cable connection Strong Endurance - Runs up to 12-hour long life Li-ion battery.Power and battery charging control with Led indicators Easy to Carry - Solid metallic belt-pack clip,High-tech, compact and portable designs for taking everywhere