Unitree A2

RobotActive

Unitree A2 is an advanced industrial-grade quadruped robot introduced in 2025 by Unitree Robotics, available in two variants: A2 and A2-PRO. Mechanical Specifications (A2 & A2-PRO): - Dimensions (standing): 820 x 440 x 570 mm - Dimensions (folded): 720 x 550 x 220 mm - Materials: Aluminum alloy + high-strength engineering plastic - Weight: ~35 kg (without battery), ~42 kg (with battery) - DOF: 12 (silver-alloy precision joint motors) - Joint bearings: Industrial-grade crossed roller bearings - Joint motors: Low-inertia, high-speed inner rotor PMSM - Max joint torque: ~180 N·m - Joint range of motion: Body -58° to 58°, Thigh -134° to 180° / -89° to 225°, Shank -158° to 30° Electrical System (A2 & A2-PRO): - Supply voltage: 50.4V - Joint encoders: Dual encoders - Cooling: Local air cooling - Battery: Dual hot-swappable slots, single 9000 mAh (453.6 Wh), dual 18000 mAh (907.2 Wh) - Wi-Fi 6 / Bluetooth 5.2, speaker, microphone array, front light - Optional: Wireless vector follow module, GPS, 4G Sensors: - A2: LiDAR x1, HD Camera x1 - A2-PRO: LiDAR x2, HD Camera x1 Control & Compute (A2 & A2-PRO): - Standard: 8-core high-performance CPU + Intel Core i7 (user dev environment) - A2-PRO optional: High Computing Power Expansion Dock - External interfaces: RS485 x2, CAN x2, Gigabit Ethernet x2, USB3.0 Type-C (8-core CPU) x2, USB3.0 Type-C (i7) x2, Power Output 12V/24V/BAT Performance (A2 & A2-PRO): - Operating temperature: -20°C to 55°C - Endurance (unloaded): >5 hours continuous walking, ~20 km - Endurance (25 kg load): >3 hours continuous walking, ~12.5 km - Max standing load: ~100 kg - Continuous walking load: ~25 kg (up to ~35 kg ideal) - Slope climbing: ~45° - Step climbing: up to 30 cm - Obstacle crossing: ~0.5–1 m - Speed: 0–3.7 m/s (max ~5 m/s) - Optional wheeled-leg conversion - Protection rating: A2 IP56, A2-PRO IP56–IP67 (core components IP67) - OTA updates, secondary development support - Warranty: 12 months