The Behringer P1 is a personal in-ear monitor amplifier with switchable stereo/mono modes, battery operation, and volume adjustment. - Model: P1 - Brand: Behringer - Type: Personal in-ear monitor amplifier - Connectors: Stereo mini-jack - Power: Battery-powered - Modes: Stereo/Mono - Battery status indicator: Yes - Volume control: Two knobs Thank you for viewing. ■ High-output headphone output ・The high-output headphone output on the "P1" is ideal for artists performing in loud environments. It provides optimal sound with simple operation. ■ Equipped with a limiter function to protect your ears from sudden loud noises. ■ Dual XLR inputs with a stereo/mono switch ・The two XLR inputs can easily switch between stereo/mono with a switch. You can also easily adjust the sound with the volume knob and L/R balance knob. ■ 9V battery operation ・Operates for up to 12 hours with a 9V battery. ■ Can be attached to your waist with the included belt pack clip. I have only used it once or twice after purchase. It can be directly fixed to a microphone stand. I don't see any scratches, but please judge from the images as it is a used item, including the accessories. Please note that the adapter is not a dedicated one.