Description
Category | Parameter | A2 (Standard) | A2-PRO |
---|---|---|---|
Mechanical | Size (standing) | 820 × 440 × 570 mm | 820 × 440 × 570 mm |
Size (lying) | 720 × 550 × 220 mm | 720 × 550 × 220 mm | |
Material | Aluminum alloy + high-strength engineering plastic | Same | |
Weight (no battery) | ≈31 kg | ≈31 kg | |
Weight (with battery) | ≈37 kg | ≈37 kg | |
DoF (motors) | 12 | 12 | |
Joint bearings | Industrial crossed-roller | Same | |
Joint motors | Low-inertia, high-speed inner-rotor PMSM | Same | |
Max joint torque | ≈180 N·m | ≈180 N·m | |
Range of motion | body −58°~58°; thigh −134°~180°/−89° |
Same | |
Electrical | Supply voltage | 50.4 V | 50.4 V |
Encoders | Dual encoders | Dual encoders | |
Cooling | Local air cooling | Local air cooling | |
Power slots | Dual slots, dual batteries | Dual slots, dual batteries | |
Battery capacity | Single 9000 mAh (453.6 Wh); Dual 18000 mAh (907.2 Wh) | Same | |
Connectivity & I/O | Wireless | Wi-Fi 6, Bluetooth 5.2 | Same |
Audio | Speaker; microphone array | Same | |
Lights | Front light | Front light | |
Optional modules | Vector-follow (optional), GPS (optional), 4G (optional) | Vector-follow (optional), GPS (optional), 4G (optional) | |
Interfaces | RS485×2, CAN×2, GbE×2, USB-C (CPU)×2, USB-C (i7)×2; power out 12V/24V/BAT | Same | |
Sensing | Sensors | 1× LiDAR + 1× HD camera | 2× LiDAR + 1× HD camera |
Compute | Onboard compute | 8-core high-perf CPU (platform) + Intel Core i7 (user dev) | Same (high-compute dock optional) |
Performance | Operating temp | −20 °C ~ 55 °C | −20 °C ~ 55 °C |
Endurance / range | >5 h no-load (~20 km) | >5 h no-load (~20 km) | |
>3 h with 25 kg (~12.5 km) | >3 h with 25 kg (~12.5 km) | ||
Max standing load | ≈100 kg | ≈100 kg | |
Continuous walking load | ≈25 kg | ≈25 kg | |
Slope capability | ≈45° | ≈45° | |
Stairs | Max step height 30 cm | 30 cm | |
Max climb height | ≈0.5–1 m | ≈0.5–1 m | |
Speed | 0–3.7 m/s (up to ~5 m/s) | Same | |
Wheel-leg kit | Optional | Optional | |
Protection & Support | Ingress rating | IP56 | IP56–IP67 (core components IP67) |
Updates & SDK | Smart OTA; secondary development supported | Same | |

The Unitree A2 brings next-gen legged mobility to real-world tasks. Built on high-torque actuators and precise, real-time control, A2 confidently traverses stairs, gravel, and uneven ground while keeping its balance. Its perception stack supports multi-sensor fusion for mapping and obstacle avoidance, and you can deploy it in minutes via teleoperation or build full autonomy with the ROS/ROS 2-compatible SDK. With payload mounting points and power/data interfaces, A2 is a flexible platform for inspection, patrol, research, demos, and field robotics.
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