NASA engineers have been putting prototypes of future moon buggies through the paces out at a field test in the Arizona desert lava fields. Here’s a video taken on Sept. 6 showing the capabilities of the Chariot B, and it’s pretty impressive. The Chariot features 12 wheels driven by two electric motors through a two-speed transmission. It can perform in a “bulldozer” mode with up to 1814 kg (4,000 pounds) of force or cruise at up to 24 kph (15 mph). Or, in this case, it can climb up extremely treacherous terrain. The modular design also means that the steel alloy frame can be fitted with several different crew and payload combinations, including a small pressurized cabin and a sample collector.