Roborock has released a beefy new robot lawnmower called the RockMow X120H that the company says can handle a half-acre lawn in a day. Like many of the latest crop of such devices, it needs no guide wires, no satellite connection, and can map your lawn all by itself. If true, it sounds like a great robot lawnmower, but it won’t come cheap—Roborock is charging $3,200 for it. The RockMow X120H looks and sounds a lot like the Segway Navimow X430 I reviewed earlier this summer. It has four-wheel drive (or all-wheel drive—the company lists both on its Amazon listing for the robot) and features a vision camera that it uses for AI-based obstacle avoidance. It can handle up to 38.7-degree slopes, can cut to within 3 centimeters of the edge of a wall, and can climb obstacles up to 3.1 inches high, the company says. © Roborock © Roborock © Roborock © Roborock Also like the Navimow X430, the RockMow X120H doesn’t require guide wires to keep it mowing where you want it to go, and Roborock claims it can map all by itself. There’s reason to hope that’s true, given that the X120H has a 360-degree LiDAR scanner atop its body. The Navimow had a hard time auto-mapping my complicated yard, but it relies on satellites and its vision camera for that. Although the X120H doesn’t rely on network RTK for its navigation like the X430, it does come with three years of free 4G connectivity to remotely track it.