AMP SIMULATORS Blackstar amPlug FLY Guitar Mini Headphone Amplifier. In this FLY version of the amPlug, the analog circuitry has been drastically improved taking inspiration from the classic FLY 3, and each model now offers 3 channels, ISF control and 3 effects: Chorus, Delay and Reverb. 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)