Features: 5 Watt all tube amp head with 2 rectifier modes(TUBE DIODES) and 8ohm/16ohm speaker output jacks, very powerful. Equipped with pre-amp tubes(1.5 * 12AX7/ECC83), power amp tubes (0.5 * 12AX7/ECC83 1 * 12BH7) and rectifier tube(1 * 6Z4). Single channel, with VOLUME, BASS, MIDDLE, TREBLE control knobs and BRIGHT/WARM tone toggle switch. German made W.I.M.A MKP capacitors, precision high frequency metal foil resistors. Compact size and full metal shell, portable and durable.