Ammoon American Sound Pedal
 
Basically a Fender Amp in a box. From sparkling Fender cleans through to overdriven valve style distortion. 
 
Great reviews and can be used either into an amp or straight into a PA system as a back up if your amp dies.
 
Amazing value for money and have great reviews. It is the same as the Joyo and the Harley Benton versions but a little more compact an any power supply will work. Some of the HB ones are temperamental unless you use a HB supply.
 
£20