Avoid changing batteries by powering the camera while it's connected to a computer or wall outlet. The DC coupler fits inside your compatible camera's battery compartment to connect the AC adapter for prolonged use.BenefitsIdeal for extended periods of shooting, scientific applications and time-lapse photographyReplaces your camera's battery for direct connection to the mains electricity supplyComprises of a DC coupler and AC power adapter in one useful kitFor use with compatible cameras only, please check you have the right