Amazon.com: Digital Camera External Microphone Compatible with Olympus Pen E-PL9 Mirrorless Digital Camera, XM-AD2 Dual Channel XLR-Mini Audio Adapter for DSLR's, Camcorders and Pro Video Cameras : Electronics
Amazon.com: Digital Camera External Microphone Compatible with Olympus OM-D E-M5 Mark III Digital Camera, XM-L Wired Lavalier Microphone - 20' Audio Cable - for DSLR's, Camcorders, Video Cameras and Smart Phones :
Olympus ME-52W Noise-Cancelling Microphone 145055 B&H Photo Video
Best Buy: Olympus External Microphone Adapter Set for E-P2/E-PL1 Cameras Black 147592