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 of your camera ... , E-400, E-330, E-300, E-3, E-1. E-30,E-20, E-10, E-100RS, E-2500 ... shipping method while sending RFQ. Thank you 5 in1 IR Remote Control for Canon Nikon Pentax Olympus SONY Camera