6 layers55 × 95 mmEcho r1-rev1amachronic/echoplayerEcho - Open Hardware Music Player154 parts281CERN-OHL-S-2.0
6 layers140 × 120.6 mmEcho r1-rev2amachronic/echoplayerEcho - Open Hardware Music Player153 parts281CERN-OHL-S-2.0