This is a battery-powered guitar and vocal amplifier, the Blackstar SUPER FLY. I purchased it about two years ago, but have only used it once for about 10 minutes. It has four inputs (guitar, microphone, MP3, Bluetooth) and an output of 12W. I think it's perfect for practicing solo singing and playing. It's battery-powered, so you can take it anywhere. I will include 8 Ni-Cad rechargeable batteries and a USB charger, both of which are new.