Licensed Halo Cortana Chip Light-Up Key Chain Size: 2&rdquo; H x 1.6&rdquo; W&rdquo; (with Gift Box) Officially Licensed Just press and hold the 'on-off' button to activate the lights. The Cortana Chip key chain features a plastic outer casing with acrylic sheet embedment, and measures 2-inches tall x 1 1/4-inches long. Batteries are not replaceable but have a 60 hour light-up life Keep your Cortana Chip Close. A highly detailed and sculpted Cortana Chip from the popular first-person shooter video game Halo 4 , the Halo 4 Cortana Chip Light-Up Key Chain features 4 blue LED lights! Authentic in-game replica with handpainted details