Comprising a series of tools to help extend your battery life, the Sony Alpha a7R II Mirrorless Digital Camera with 28-70mm Lens and Tether Tools Accessories Kit from B&H pairs the full-frame body and standard zoom lens with a Tether Tools Case Relay camera power system, a compatible Relay Camera Coupler, a Rock Solid 10,000mAh external battery pack, and a StrapMoore for organizing your shooting setup.