Neewer Replacement Battery Grip for HLD-7 Works with BLN-1 Rechargeable Battery for Olympus E-M1 Compact System Cameras Replacement for Olympus HLD-7 battery grip.Works with BLN-1 battery. Specially designed for Olympus E-M1 camera. Additional vertical release button & adjustment dials Ergonomic design for firm grip & increased stability With AC Port, support AC Power Adapter Replacement for Olympus HLD-7 battery grip.Works with BLN-1 battery.^Specially designed for Olympus E-M1 camera.^Additional vertical release button & adjustment dials^Ergonomic design for firm grip & increased stability^With AC Port, support AC Power Adapter