This is a discontinued model, a Pultec clone-type tube equalizer. I have confirmed that all basic functions are working without issue. The only included accessory is the power cable. The manual can be downloaded from the manufacturer's website. This item comes from a smoke-free and pet-free environment. Please refrain from price negotiations. I would appreciate it if you would consider the current price. Thank you. <From the manufacturer's website> Classic Tube Equalizer ◆ 1-channel, 2-band equalizer based on the traditional Pultec* EQP-1A ◆ Class A, all circuits are independent to enhance the highest signal integrity ◆ Vacuum tubes use high-quality 12AX7 and 12AU7 tubes ◆ Custom-designed MIDAS input/output transformers ◆ Selector switch with up to 7 frequency points ◆ Independent boost/cut controls offer immense creative possibilities ◆ Variable bandwidth control for shaping a wide range of sounds ◆ Coil-based equalizer section ◆ Bypass function allows for easy A/B comparison ◆ Transformer-balanced input/output with Neutrik* XLR connectors ◆ Durable 2U rack-mount chassis for durability ◆ Auto-ranging, universal switching power supply ◆ Designed and configured in the UK