The A2-W is the wheeled member of Unitree's industrial A2 family, and the extra ten kilograms over the legged version buy range. It stands 900 x 440 x 625 mm, weighs about 52 kg with batteries, and runs on a dual 18000 mAh (907.2 Wh) pack that is hot-swappable — the detail that matters for patrol duty, since the machine need not stop to charge. Unloaded it walks more than three and a half hours and about 35 km; with 25 kg aboard it manages over an hour and a half and roughly 15 km. Continuous walking load is about 25 kg (up to 35 kg in favourable conditions) and standing load about 100 kg, at 0-3 m/s with bursts near 6 m/s. Sixteen degrees of freedom on industrial crossed roller bearings, two lidars, an HD camera, a microphone array and a front light complete it; protection runs IP56 to IP67 on core components, with an operating range of minus 20 to 55 degrees Celsius.