The AC Adapter Kit ACK-E2 enables the EOS 5D, 50D, 40D, 30D, 20D, 10D, D60, D30 and Digital Rebel to draw power directly from an AC power source. It is designed to supply uninterrupted power for your camera. Kit includes the AC adapter, DC coupler and power cord. Purchase this and save the battery life of your dedicated lithium ion batteries. This accessory is ideal for extensive studio work.