TetherBoost Power Kit with US Power Adapter Bundle includes: One (1) TetherBoost Core Controller, One (1) Rock Solid External Power Bank (10,000mAh), One (1) TetherBoost USB to D/C Power Cable, One (1) StrapMoore Extender, One (1) A/C Power Cord, One (1) TetherBoost USB-D/C Power Cable Boost and regulate power from a DSLR camera and/or digital back Solves common issues when tethered to USB 3.0 cameras Provides consistent power to maintain a stable, reliable connection when a camera is connected to a computer via USB cables