This is the Electro-Harmonix Freeze. To be honest, it might be completely unnecessary for some, but it's a lot of fun for those who get into it. There are various samples on YouTube, so please check them out. It was used indoors, so it's in very good condition. Also, there are no operational problems. It comes with the adapter, box, warranty, and manual. - Model Name: FREEZE SOUND RETAINER - Brand: electro-harmonix - Effect Type: Sound Retainer - Controls: FAST, SLOW, LATCH, EFFECT LEVEL - Power: 9V DC - Switch Type: Footswitch Thank you for looking.