Set includes HA400 plus Set of 5 -1/4" Stereo Headphone Adapters</br>Ultra-compact monitor distribution system for studio and stage with 4 independent stereo high-power amp sections. Highest audio quality with all types of headphones even at max volume.</br>Powers up to 4 pairs of headphones simultaneously with independent Level control per channel. DC 12V adapter included</br>Genuine Behringer product - 3 year Warranty</br></br>Product Description</br></br><b>The compact and flexible HA400</b> can power up to 4 pairs of headphones and up to 4 independent volumes?? with outstanding audio quality - even at maximum volume. Features 4 high-power?? ultra low-noise 4580 operational amplifiers for outstanding audio performance - these are the same op amps found in "ll-size" audio equipment. Includes a dedicated 12-Volt DC adapter.<br></br><b>Genuine Behringer Product sold by Authorized Dealer - Purchase with confidence with 90 day Warranty Program. Includes BONUS Adapter Set</b></br><br/>http://www.amazon.com/gp/product/B01K5WT5F88r