Portable 4-way Stereo Monitor Headphone Amplifier Mixer Ear Splitter Four-way Output Mixing Audio Hub One-input Four-output Distributor Mixer Headphone Amplifier. Developed for professional recording studios, it is a small, low-priced, but professional-spec headphone distributor. The sound is clear and clean with a wide dynamic range. 4 headphone outputs with volume potentiometers, 150mW power per channel. It has a wide frequency response and the noise floor is only -95 dB. Comes with four powerful stereo amplifiers that deliver outstanding performance at any volume. Clear sound with ultra low-noise 4580 operational amplifiers that are used in 19inch studio equipment. Separate volume control for each channel Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. voltage: AC110V Colour:black Material:Metal Package Contents: 1 * 4-way headphone amplifier 1 * power supply Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.