Relay Camera Coupler CRN5A for Nikon D3100, D3200, D3300, D5100, D5200, D5300, D5500, Df 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 most Nikon cameras. Check to confirm your camera model is supported. Relay Camera Coupler CRN5A for Nikon D3100, D3200, D3300, D5100, D5200, D5300, D5500, Df