Features: Total 8 LOOP channels, but can be used as dual independent 4-channel setting. Equipped with 2built-in programmable triggers, to switch the Amp channel or effects mode settings with them.2 triggers can be set separately, like trigger polarity, mode & action status. With MIDI controller, allow user to send two sets of MIDI date & control functions or parameters of the device. With tuner interface & mute switch for keeping mute or tuning. Buffered bypass will color your tone, allow you to run long cables without worry. Metal alloy housing, durable & sturdy.