Check the listing for details. PreSonus HP4 4-Channel Compact Headphone Amplifier w/18V DC adapter. Color: Aqua, Condition: Used. Listed at 90.00 USD. One owner. Used in non-smoking spaces (i.e. studio/rehearsal space). Although the item is used, it is excellent condition operationally, has some minor cosmetic scratches on top of chassis (see photos). Ships with 18V DC power adapter and paperwork in Original box. Input/Output· 4 screaming-loud (130 mW per channel) stereo ¼-inch headphone outputs (front panel)· 2 balanced ¼-inch line outputs (monitor outputs)· 2 balanced ¼-inch line inputsMeters, Controls, and Features· Headphone level control for each channel· Mono summing switch for each channel· Monitor level control· Monitor mute switch· Daisy-chain multiple units via monitor outputsPhysical· Compact 1/3U rack-mount chassis· Sealed, detented, metal rotary controls· External 16 VAC power supply - INCLUDED =====Sales Tax: California residents are required to pay sales tax. This will be automatically added to your eBay invoice when the item is shipped within the state of California. eBay may independently collect sales tax depending on your state's laws. Shipping: Ships ONLY to the lower 48 states. Will ship following order/payment and address confirmation and insure up to amount declared or up to the maximum allowed depending on the shipping service. The buyer assumes responsibility for any additional damage above the amount that insurance covers.=====