Behringer Model D Analog Desktop Mono Synthesizer Clear Overlay by TOSO (The Original Synth Overlay).  This is a limited run there only 25 in existence currently. This durable plastic overlay can go right overtop of your buttons and knobs on your Behringer Model D. These work great with chalk and paint markers. Use different colors to save multiple sounds on one overlay!  A little thinner than a credit card but pliable and durable.  This sale is for 1 clear overlay for the Behringer Model D. Behringer Model D not included. See my gold and silver Model D version by looking at my other sales. Also, clear overlays are available for the Behringer Pro 1, K2, and Neutron.