Relay Camera Coupler CRSFW50 for Sony a7, a7 II, a7R,a7R II, a7S, a7S II, a6300, a6000, a5100, a5000, DSC-RX10, DSC-RX10 II, NEX-7, NEX-6, NEX-5R, NEX-5, NEX-5N, NEX-3N, NEX-F3, NEX- C3, NEX-3 Pair the Relay Camera Coupler with the Case Relay Camera Power System to provide constant, uninterruptable power for your camera Power sources are non-proprietary. Power your camera with the same 5V battery you use to charge phones or tablets. Never need to charge camera batteries again. And never run out power Compatible with Sony cameras. Check to confirm your camera model is supported. Relay Camera Coupler CRSFW50 for Sony a7, a7 II, a7R,a7R II, a7S, a7S II, a6300, a6000, a5100, a5000, DSC-RX10, DSC-RX10 II, NEX-7, NEX-6, NEX-5R, NEX-5, NEX-5N, NEX-3N, NEX-F3, NEX- C3, NEX-3, A37, A33, A35, A55