Battery is included. Contains: 5 in 1 Remote Control fit for Canon Nikon Sony Pentax Olympus x1 Lithium CR2025 battery (inside) x1Introduction :With this ... 5 in 1 remote control, you can control the shutter ... , Z180u, Z155, 120, 370Zfor Olympus: E-520, E-510, E-500, E-420, E-410, E-400, E-330, E-300 ...