Here is another portable security, surveillance, and tactical robot from Inspectorbots. The Stealth Pan/Tilt Trackbot (SPTT) has a rugged design with an all-aluminum shell. It can turn on a time and provide you with a video of its surroundings using a HD camera.
The robot can be teleoperated and provide you with first-person video. It can handle max incline of 35 degrees. As you can see in the below video, this Trackbot works in snow.