Meet Guardian S from Sarcos Robotics: a snake robot for surveillance and inspection jobs. It weighs 13 lbs and can reliably traverse difficult terrain. It also features two-way video and audio. The robot is waterproof and can navigate confined spaces with no problem.
Guardian S has a range of 4 miles. It has simple remote controls and customizable sensors, including infrared, gas, vibration, GPS, and accelerometer.
More info is available here.