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DEV-12640 - SparkFun, Pro Micro 5V 16MHz
Pro Micro 5V / 16MHz - ProtoSupplies
Pro Micro - 5V/16MHz (Open hardware) - EasyEDA open source hardware lab
Pro Micro Compatible Board - 5V/16MHz
ProtoCentral - Buy Development Kits, Boards, Sensors and Components Online
SparkFun 12640 Pro Micro - 5V/16MHz
12 digital I/O, 5 with PWM and 9 analog inputs in a tiny package.
Pro Micro 5V / 16MHz
Pro Micro - 5V/16MHz from MindKits New Zealand