Unitree A2 | Unitree Robotics

Unitree A2

Stellar Explorer

Agile & Swift Lightweight Extended Endurance
Weighs around 37kg, fully loaded can continuously walk 3h / 12.5km
Unloaded can continuously walk 5h / 20km.
Lighter, Faster, Tougher
Industrial-Grade Legged Robot Heavy Payload Standard
Premium mobile hardware platform, open for rapid development

Conquer Rugged Terrain with Ease

Dual-Sided Perception

Zero Blind Spots Greater Accuracy

2 industrial LiDARs (front & rear) , HD camera + front light to detect the environment ahead

Wheel-Leg Option Available

Unleash Greater Performance

Dual Battery System

「Hot-Swappable Dual Batteries · Unlimited Runtime」: Seamless Battery Swap, Uninterrupted Mission

Dual-battery parallel design: swap without stopping, the eternal heart for extreme missions

Reliable triple power system guarantees from -20°C to 55°C

High Power，Smart Control

Multi-Scenario Ready

From logistics, industrial inspection, to emergency rescue — effortlessly navigating extreme and complex environments with confidence

Medium Size Powerful Performance Industry Choice

Unitree A2 Parameter

A2
Contact Sales
A2-PRO
Custom Industry Solutions
Contact Sales

Mechanical Parameters

Size (Standing)
820mm x 440mm x 570mm
820mm x 440mm x 570mm
Size (Lying Prone)
720mm x 550mm x 220mm
720mm x 550mm x 220mm
Material
Aluminum Alloy + High-Strength Engineering Plastic
Aluminum Alloy + High-Strength Engineering Plastic
Weight (without battery)
About 31kg
About 31kg
Weight (with battery)
About 37kg
About 37kg
Degrees of Freedom (Joint Motors)
12
12
Joint Bearings
Industrial-grade crossed roller bearings (high precision, high load capacity)
Industrial-grade crossed roller bearings (high precision, high load capacity)
Joint Motors
Low-inertia, high-speed inner rotor PMSM
(enhanced response & heat dissipation)
Low-inertia, high-speed inner rotor PMSM
(enhanced response & heat dissipation)
Max Joint Torque
About 180 N.m
About 180 N.m
Range of Motion
body：-58~58°
thigh：-134°~180°/-89°~225°
shank：-158°~-30°
body：-58~58°
thigh：-134°~180°/-89°~225°
shank：-158°~-30°

Electrical Characteristics

Supply Voltage
50.4V
50.4V
Joint Encoder
Dual encoders
Dual encoders
Cooling System
Local air Cooling
Local air Cooling
Power Supply
Dual slots, dual batteries
Dual slots, dual batteries
Battery Capacity
Single Battery 9000mAh（453.6Wh）
Dual Batteries 18000mAh（907.2Wh）
Single Battery 9000mAh（453.6Wh）
Dual Batteries 18000mAh（907.2Wh）
Wi-Fi 6, Bluetooth 5.2
YES
YES
Speaker
YES
YES
Microphone
Microphone array
Microphone array
Front Light
YES
YES
Wireless vector follow module
/ （Optional）
Expand （Optional）
GPS
/ （Optional）
Expand （Optional）
4G
/ （Optional）
Expand （Optional）
Sensor
LiDAR × 1 + HD Camera × 1
LiDAR × 2 + HD Camera × 1
Control & Compute
Standard: 8-Core high-performance CPU (platform) + Intel Core i7 (user development)
Standard: 8-Core high-performance CPU (platform) + Intel Core i7 (user development)
Optional: high computing power expansion dock
External Interfaces
RS485 x 2
CAN x 2
Gigabit Ethernet x 2
USB3.0-TypeC(8-Core CPU) x 2
USB3.0-TypeC (Intel Core i7)x2
Power Output：12V / 24V / BAT
RS485 x 2
CAN x 2
Gigabit Ethernet x 2
USB3.0-TypeC(8-Core CPU) x 2
USB3.0-TypeC (Intel Core i7)x2
Power Output：12V / 24V / BAT

Performance Metrics

Operating Temperature
-20℃～55℃
-20℃～55℃
Battery Life
No Load：
>5hours continuous walking, approx. 20km
With 25kg Load：
>3 hours continuous walking, approx. 12.5km
No Load：
>5hours continuous walking, approx. 20km
With 25kg Load：
>3 hours continuous walking, approx. 12.5km
Max Standing Load
About 100kg
About 100kg
Continuous Walking Load
About 25kg
About 25kg
Slope Walking Capability
About 45°
About 45°
Stair Climbing Capability
Max Step Height: 30cm
Max Step Height: 30cm
Max Climb Height
About 0.5～1m
About 0.5～1m
Speed
0–3.7 m/s (Up to ~5 m/s)
0–3.7 m/s (Up to ~5 m/s)
Replace Wheel-leg
Optional
Optional
Ingress Protection Rating
IP56
IP56–IP67 (Core components rated IP67)

Other

Smart OTA Upgrade
Continuous Upgrades
Continuous Upgrades
Secondary Development
Supported
Supported
Warranty
12 Months
12 Months

[1]

For detailed functions, please refer to the Secondary Development Manual.

[2]

For detailed warranty terms, please refer to the Product Warranty Manual.

[3]

The above parameters may vary in different application scenarios and different configurations, please contact sales before purchasing.

[4]

This quadruped robot has a complex structure and powerful dynamics. Users must keep a safe distance from the robot at all times. Please use with caution.

[5]

Product appearance may be subject to future upgrades and changes, please refer to the actual situation.

[6]

Some example features shown on this page are under development and testing, and will be made available to users gradually.

This product is a civilian robot. We kindly request that all users refrain from making any dangerous modifications or using the robot in a hazardous manner.

Please visit Unitree Robotics Website for more related terms and policies, and comply with local laws and regulations.