Heart Attack is the newest member of the Nano line, and it is for metal heads. It is similar to the other Nano amp heads in its compact design and five huge watts of output. But it is unique in sound and feel. The Heart Attack design is based on the Mesa Boogie Rectifier, offering metal players that classic hard rock high gain sound. You can pull it out of your pocket and unleash an unimaginable mass of energy plugged in, all without losing control. Features include: · Extremely compact configuration for portability · High quality tone with Volume and Gain controls · 3 Band EQ controls for shaping your tone ·Speaker out can automatically fit cabinets of different impedances (4-16) ·¦FX LOOP for using external effects ·¦Headphone output jack is very convenient for practicing and recording ·¦Aux In jack can let you play with an external music player ·¦18V DC power supply (Adapter included) ·¦Power Output: 5 Watts ·¦Dimensions: 128mm (W) x 75mm (D) x 59.5mm (H) ·¦Weight: 440 g