This robotic sentry can be controlled by any remote device capable of browsing the internet, allowing you to monitor your home from anywhere in the world. Audio and high-resolution (640 x 480) video are streamed in MPEG4 format, and it can take still pictures and e-mail them to you; it has a two-way microphone and speaker that enable real-time interaction with subjects. Three wheels support its chassis, providing 360° of nimble movement as its camera boom extends to provide a wide field of view while surveying its surroundings. You can set the sentry with up to 10 paths for a customized patrol; it will move along a path, detecting and avoiding obstacles with its infrared sensor, and repeat the sequence until issued new orders. It operates for two hours from its rechargeable battery which draws power from the included recharging base (the sentry can locate its base using its built-in infrared sensor when you command it to re-charge remotely); full charge requires two hours. Requires a PC running Windows XP or Vista (or Macintosh with a Wi-Fi card), a broadband internet connection, router, or other type of wireless access point (sentry has a 100' wireless range). Ages 8 and up. 5" H x 10 1/2" L x 9" W; (10" H with camera deployed) (5 lbs.)