Unitree As2 Review: Specs, Versions and Uses of the 20 kg Quadruped Robot
Updated: 7 days ago
The Unitree As2 is a quadruped robot of about 20 kg, offered in four versions from the basic AIR to the developer EDU. Unitree lists all versions as "Contact Sales". This review covers its specifications, versions and uses.
Quick Verdict
The As2 sits above the Go2 in Unitree's consumer and education range. Unitree describes its dynamic performance as about twice that of the Go2: joints of up to 95 N·m, a standing load of up to 65 kg and running speeds above 5 m/s on the top versions, in a robot that weighs 20 kg. Runtime reaches four hours and about 20 km. The versions differ widely. The AIR has a smaller battery, no protection rating and no development access; development is supported only on the X and EDU. Unitree notes that its data comes from laboratory conditions.
Unitree As2 at a Glance
Weight: about 20 kg with battery
Versions: AIR, PRO, X, EDU
Max joint torque: about 65 to 95 N·m
Runtime without load: about 2 to 4 hours
Protection: IP54 on PRO, X and EDU
Price: on request
Unitree As2 Versions and Specifications
The table below compares the four versions.
Specification | AIR | PRO | X | EDU |
Max joint torque | About 65 N·m | About 75 N·m | About 95 N·m | About 95 N·m |
Speed | 0 to 3.0 m/s | 0 to 3.7 m/s | Up to about 5 m/s | Up to about 5 m/s |
Max standing load | About 45 kg | About 55 kg | About 65 kg | About 65 kg |
Continuous walking load | About 10 kg | About 13 kg | About 15 kg | About 15 kg |
Runtime without load | About 2 h, 10 km | About 4 h, 20 km | About 4 h, 20 km | About 4 h, 20 km |
Slope | About 30 degrees | About 40 degrees | About 40 degrees | About 40 degrees |
Stairs | 20 cm | 25 cm | 25 cm | 25 cm |
LiDAR | Unitree L2 | Industrial 64 to 128 line | Industrial 64 to 128 line | Industrial 64 to 128 line |
Battery | 8000 mAh | 15000 mAh | 15000 mAh | 15000 mAh |
Protection | Not listed | IP54 | IP54 | IP54 |
Secondary development | Not supported | Not supported | Supported | Supported |
Warranty | 6 months | 12 months | 12 months | 12 months |
Detailed Technical Data
Size, standing: 720 x 378 x 457 mm
Degrees of freedom: 12
Supply voltage: 36 to 50.4 V
Computing: 8-core CPU
Connectivity: Wi-Fi 6 and Bluetooth 5.2
Operating temperature: -20 to 50 °C; -20 to 55 °C on X and EDU
Design and Build Quality
The body is aluminium alloy and engineering plastic, with crossed roller bearings, inner-rotor motors and dual encoders in the joints. A speaker, microphone, front light and HD camera are standard on all versions.
Programming and Software
UniStore and Updates
All versions support Unitree's UniStore platform and over-the-air upgrades.
Development
The X and EDU support secondary development; the EDU adds a charging dock and a high-compute expansion dock.
Following
The PRO, X and EDU include the ISS 3.0 side-follow system.
Unitree As2 Applications and Use Cases
Education and Research
The EDU is the development platform.
Outdoor Companion and Carrying
Walking loads of 10 to 15 kg and long runtime suit outdoor use.
Light Inspection
Industrial LiDAR on the upper versions supports mapping and patrol.
Unitree As2 Price and Value
Unitree lists all four As2 versions as "Contact Sales" and does not publish prices.
For the company behind the product, read the Unitree Robotics Company Profile: History, Products, Stock Listing and Controversies.
Pros and Cons
Pros
Strong joints for a 20 kg robot
Up to 4 hours and 20 km
Industrial LiDAR on PRO and above
Four versions for different budgets
IP54 on PRO and above
Cons
AIR has no protection rating and a 6-month warranty
Development only on X and EDU
Figures from laboratory conditions
No published prices
Who Should Buy the Unitree As2?
It fits users who have outgrown the Go2: enthusiasts on the AIR and PRO, and developers and universities on the X and EDU.
Unitree As2 FAQ
How much does the Unitree As2 cost?
Unitree does not publish prices; all versions are listed as "Contact Sales".
Which versions of the Unitree As2 are there?
AIR, PRO, X and EDU.
How much does the Unitree As2 weigh?
About 20 kg with battery.
How fast is the Unitree As2?
Up to 3.0 m/s on the AIR, 3.7 m/s on the PRO and about 5 m/s on the X and EDU.
How long does the Unitree As2 battery last?
About 2 hours on the AIR and about 4 hours on the other versions, without load.
How much can the Unitree As2 carry?
About 10 to 15 kg while walking, depending on version.
Can the Unitree As2 be programmed?
Secondary development is supported on the X and EDU versions.
Is the Unitree As2 waterproof?
The PRO, X and EDU are rated IP54; no rating is listed for the AIR.
Specifications are based on manufacturer information and may change.
