Micro MIDI Filter is certainly the smallest MIDI Channel Filter.
It allows you to select a MIDI channel that will be present  at the MIDI output.
Tipical applications are:
Selecting a single midi channel for instruments receiving only in MIDI OMNI  such as Roland JX-3P and more.
Avoiding to program a MIDI channel everytime you start your  Roland TR-909 / Juno 106 / Jupiter 8 and more
Programation is done by MIDI from your keyboard or sequencer.
Selecting a new MIDI channel is done by sending 2 consecutive  "Program Changes" between 1-16
The parameters are keps in a batteryless non-volatile memory.
Plug & Play     Ready to use.     Easy to install, only 2 cables 1 parameter entry and that's all.     Plug it and forget it, no buttons, only 1 parameter.     No power supply or batteries.
	Dimensions	90 X 60 X 32 mm
	Weight	65 Gr
	Connectors	MIDI In
		MIDI Out
	Signal Input	MIDI Data
	Signal Output	Filtered MIDI Channel
	Display	Led 3mm