The Unitree A2 is a medium sized, industrial-grade legged robot designed for demanding missions that require agility, strength, and endurance. With a robust build and intelligent perception systems, it delivers dependable performance in logistics, inspection, emergency rescue, and other challenging scenarios.

Mechanical Design

• Dimensions (Standing): 820mm × 440mm × 570mm

• Dimensions (Lying Prone): 720mm × 550mm × 220mm

• Material: Aluminum alloy + high strength engineering plastic

• Weight: 31kg without battery, 37kg with battery

• Degrees of Freedom: 12 (industrial grade crossed roller bearings for high precision and load)

• Joint Motors: Low inertia, high speed inner rotor PMSM with enhanced response and heat dissipation

• Max Joint Torque: ~180 N·m

• Range of Motion:

  • Body: -58° to 58°

  • Thigh: -134°~180° / -89°~225°

  • Shank: -158° to -30°

Electrical & Control Systems

• Power Supply: Dual battery slots (hot swappable), 50.4V

• Battery Capacity:

  • Single: 9000mAh (453.6Wh)

  • Dual: 18000mAh (907.2Wh)

• Processing:

  • Standard: 8-core high performance CPU (platform) + Intel Core i7 (user development)

  • Optional: High-computing power expansion dock

• Connectivity: WiFi 6, Bluetooth 5.2

• Audio/Visual: Microphone array, speaker, front light

• Interfaces: RS485 × 2, CAN × 2, Gigabit Ethernet × 2, USB3.0-TypeC × 4, 12V/24V/BAT outputs

Sensing & Navigation

• Perception: Dual industrial LiDARs (front & rear), HD camera

• Navigation: Zero blind spots, high accuracy, rugged terrain adaptation

• Optional Modules: GPS, 4G, wireless vector follow

Performance

• Operating Temperature: -20°C to 55°C

• Battery Life:

  • No load: >5h, ~20km

  • 25kg load: >3h, ~12.5km

• Load Capacity:

  • Continuous walking load: ~25kg

  • Max standing load: ~100kg

• Terrain Capability:

  • Slope: ~45°

  • Max step height: 30cm

  • Climb height: 0.5–1m

• Speed: 0–3.7 m/s (up to ~5 m/s)

• Ingress Protection: IP56 (core components up to IP67)

Applications

From industrial inspection and heavy duty logistics to search and rescue operations, the Unitree A2 is engineered for extreme reliability, mobility, and adaptability.