Foto&Tech IR Wireless Shutter Release Remote Control for Sony Alpha Series A33, A55, A99, A900, A700, A580, A560, A550, A500, A450, A390, A330, A230 DSLR Cameras & NEX-7, NEX-6, NEX-5 Compact Cameras Wireless Shutter Release -Trigger the cameras shutter release remotely from a distance Eliminates vibrations caused by physically pressing the shutter release. Operating range- up to 32 ft. It is powered by a CR-2025 3v battery (included). Sony compatible. 1 Year Replacement Warranty by FotoTech.