Unitree A2

The Unitree A2 is an industrial-grade quadruped robot engineered for demanding field operations such as inspection, security patrol, mapping, and logistics. Built around twelve high-torque joint actuators, dual industrial LiDAR, and hot-swappable batteries for 24/7 duty cycles, the A2 combines rugged durability with the open control interfaces required for research, autonomy development, and commercial deployment.

Rugged Industrial Mobility

The A2 is built for the field. Twelve high-performance electric joint actuators deliver up to 180 N·m of torque, enabling a top speed of up to 5 m/s, a maximum step height of 300 mm, and slope traversal of up to ±45°. An ingress-protected chassis (IP56 outer body, IP67 internal compartments) allows operation across an ambient range of −20 °C to +55 °C, in dust, rain, and uneven terrain.

Continuous Operation and Heavy Payloads

Two 9,000 mAh hot-swappable batteries support uninterrupted, around-the-clock operation by allowing battery exchange without powering down. The A2 carries a 25 kg payload while walking and supports up to 100 kg in a stationary stance, providing ample capacity for sensor packages, manipulators, and mission equipment.

Autonomous inspection deployment

360° Perception

Dual industrial LiDAR units (front and rear) provide full 360° spatial awareness for mapping, obstacle avoidance, and autonomous navigation. An HD camera with an integrated front LED enables low-light operation, while proprioceptive sensors (joint encoders and an IMU) support stable closed-loop locomotion and state estimation.

Open Control and Developer-Friendly Design

The A2 exposes fully open, low-latency control interfaces over the official unitree_sdk2 (C++) and unitree_ros2 packages, communicating via DDS. It is suitable for:

• Autonomous inspection and security patrol

• SLAM, mapping, and outdoor navigation research

• Whole-body and locomotion control development

• Multi-robot and fleet coordination

Note

For SDK setup, network configuration, and example commands, see the SDK Development section. The official developer reference is maintained by Unitree at the A2 SDK Development Guide.

Specifications

Official Unitree A2 parameter diagram

Physical & Mechanical

Parameter	Specification
Dimensions (L × W × H, standing)	720 × 550 × 820 mm
Weight (with battery)	~37 kg
Weight (without battery)	~31 kg
Total Degrees of Freedom	12 (3 per leg)
Joint Actuators	12 high-performance electric joints
Peak Joint Torque	Up to 180 N·m
Ingress Protection	IP56 (outer body) / IP67 (internal)
Operating Temperature	−20 °C to +55 °C

Mobility & Performance

Parameter	Specification
Maximum Speed	Up to 5 m/s
Maximum Step Height	300 mm
Maximum Slope	±45°
Payload (walking)	25 kg
Payload (stationary)	Up to 100 kg
Operational Range (unloaded)	~20 km
Operational Range (loaded)	~12.5 km

Power & Endurance

Parameter	Specification
Battery	Dual 9,000 mAh hot-swappable packs
Runtime (unloaded)	~5 hours
Runtime (full load)	~3 hours
Hot Swap	Yes (24/7 operation supported)

Sensing & Compute

Parameter	Specification
LiDAR	Dual industrial LiDAR (front + rear, 360°)
Camera	HD camera with front LED illumination
Proprioception	Joint encoders + IMU
Onboard Compute	Embedded octa-core CPU
Optional Compute	Intel Core i7 module

Connectivity

Interface	Specification
Wireless	Wi-Fi 6 + Bluetooth 5.2
Wired	Gigabit Ethernet (RJ45) + USB-C
Optional	4G LTE + GPS

Warning

Safety Notice: The A2 is a high-power industrial robot capable of rapid, forceful motion. Maintain adequate clearance during operation, keep the emergency stop accessible, and never allow untrained personnel to operate the robot.

Civilian Use Only: This product is intended exclusively for lawful civilian applications. Hazardous modifications and deployment in dangerous contexts are strictly prohibited.

Note

Specification Source: Values summarised here are drawn from Unitree’s published material and may vary by firmware version, configuration, and operating conditions. Always cross-reference the official Unitree A2 SDK Development Guide before development or deployment.