Wired shutter release with 2.5mm TRS jack for select Olympus & OM System models. Compatible with: OM SYSTEM OM-1 OM SYSTEM OM-5 Olympus LS-100 Olympus OM-D E-M1 Mark II Olympus OM-D E-M1 Mark III Olympus OM-D E-M1X Olympus OM-D E-M5 Mark III