]The ONsite Relay C Camera Power System lets you power your camera continually with any external USB-C battery or AC wall power, providing peace of mind knowing you have an uninterrupted power source for your camera. ONsite Relay C Camera Power System provides the most up-to-date USB-C technology to photographers by giving them uninterrupted power to their camera with the ability to “hot swap” between multiple USB-C batteries which gives them the flexibility needed on a photoshoot. Requires Relay Camera Coupler (sold separately).Features: Perfect for: astrophotography, night photography, timelapses, shooting video, long exposures, and travel photography Continually power your camera with USB-C battery packs or AC wall power Run two batteries simultaneously for longer runtime and no downtime No need to purchase multiple camera batteries Universally compatible with most proprietary Canon, Nikon, Sony, Lumix, Fuji, Blackmagic and Olympus cameras, many Sony NP-F L-Series video monitors and lights and compatible with cameras and devices requiring up to 8V of power Can be adapted for use with D-Tap batteries Easy mounting options with integrated silicon strap and 1/4″-20 mount In The Box:Tether Tools ONsite Relay C Camera Power SystemONsite Relay CAdapter for Nikon CouplersAdapter for Canon Couplers4.2mm female to 5mm female reducer5mm female to 5mm female coupler *Note: Requires Relay Camera Coupler (sold separately).