Just below the Mic socket are the micro-HDMI and AV/USB connectors, concealed beneath a hinged rubber door. The lower of these two is also compatible with Olympus's RM-UC1 wired remote release (or third party clones).
Note that the E-M1 has no infrared wireless release. However it can be controlled by a smartphone or tablet over Wi-Fi using Olympus's OI.Share app.