The Roland Micro Cube is a guitar amplifier with the following features: 
Roland+1
Power Output: 3 W
Speaker: 12 cm (5 inches) x 1
Controls: POWER switch, AMP TYPE switch (ACOUSTIC SIM, JC CLEAN, BLACK PANEL, BRIT COMBO, CLASSIC STACK, R-FIER STACK, EXTREME, MIC)
Indicators: POWER, MEMORY
Connectors: INPUT jack (1/4-inch phone type)
Power Supply: AC adaptor
Current Draw: 155 mA
8 COSM amp models and 8 DSP effects 
Built-in chromatic tuner 
Memory function lets you save your favorite settings for easy recall 
i-CUBE LINK jack lets you interface with iOS devices 
Play back music from nearly any music player or audio device 
Recording/headphones output 
Runs on 6 AA batteries or AC adapter