AMP SIMULATORS Blackstar amPlug FLY Bass mini-headphone amplifier. In this FLY version of the amPlug, the analog circuitry has been drastically improved taking inspiration from the classic FLY 3 BASS, and each model now offers 3 voices: Classic, Modern and Overdrive + 6 Rhythm Patterns. Connections: Headphone output, AUX in. Power: AAA batteries x 2. Battery life: 11 hours (with alkaline batteries, RHYTHM on), 17 hours (with alkaline batteries, RHYTHM off), 4 hours (with zinc-carbon batteries, RHYTHM on), 9 hours ( with zinc-carbon batteries, RHYTHMoff). Dimensions: (W x D x H): 86 x 80 x 31 mm. Weight: 40g (without batteries). Accessories: 2 x alkaline batteries (for operation check)