Rolls HA204 4 Output Stereo Headphone Amplifier, High 20 DB Gain Per Channel, 9 Volt Battery Operation

The Rolls HA204 is a 4-channel, portable headphone amplifier powered by a single 9 Volt battery or an optional AC adapter. This lightweight unit has a very cool and unique translucent blue appearance and provides separate level control sliders for each of the 4 outputs. All connectors are 1/8inch stereo mini jacks.