Unitree wheel-legged quadruped robot
Unitree A2-W
The Unitree A2-W is a wheel-legged robot dog with a 20 to 25 kg payload and about 20 km of unloaded range, sold by Stokes Robotics in Standard and Pro configurations for logistics and inspection.
52 kg
Weight
20 to 25 kg
Payload
~20 km
Range
~6 m/s
Top speed
Starting at $36,900.00
Paying with a purchase order or need a formal quote for approval? Request a quote and our sales team will build it with you.
Secure online checkout
Headquarters in Carl Junction, Missouri, USA
Curriculum and operator training available
Overview
Unitree A2-W at a glance
01
Wheels and legs
Rolls on 190 mm tires and climbs stairs and steps with its legs.
02
Carries a real load
About 20 to 25 kg of payload, with 2.5 to 3 hours of operation at 25 kg.
03
Hot-swap power
A dual-bay battery system, with about 1 hour to charge each battery.
04
Pro navigation
The Pro adds a second LiDAR, SLAM mapping, autonomous navigation, GPS, and 4G.
What it is
A wheel-legged robot dog built to carry
The Unitree A2-W puts wheels on the legs of the A2. It rolls across open ground with 20 to 25 kg on board, then uses its legs to climb stairs and step up obstacles.
Stokes Robotics sells the A2-W in Standard and Pro configurations. Both support high-level and low-level secondary development. The Pro adds a second LiDAR, GPS, 4G, and a high-performance expansion dock for SLAM mapping and autonomous navigation.
Where the A2-W works
Built for three kinds of work
Park and campus logistics
Move a 20 to 25 kg payload across large sites on wheels.
Industrial inspection
LiDAR, a wide-angle camera, and IP56 protection, or IP56 to IP67 on the Pro.
Emergency response
Climbs stairs of 28 cm or more and single steps of 90 cm or more.
Specifications
Unitree A2-W specifications
Figures come from Unitree Robotics published specifications and Stokes Robotics product data. Figures vary by configuration.
| Specification | Unitree A2-W |
|---|---|
| Size and weight | |
| Standing (L × W × H) | 900 × 440 × 625 mm |
| Lying prone (L × W × H) | 930 × 685 × 210 mm |
| Weight | About 45 kg without battery, about 52 kg with battery |
| Tires | 190 mm diameter, 51 mm wide |
| Performance | |
| Speed | 0 to 3 m/s, up to about 6 m/s |
| Payload | About 20 to 25 kg |
| Stairs | No less than 28 cm maximum continuous stair height |
| Single step | No less than 90 cm |
| Maximum slope | 45° |
| Degrees of freedom | 16 |
| Maximum joint torque | About 180 N·m |
| Endurance | |
| Without load | About 4 to 5 hours, about 20 km |
| With a 25 kg load | About 2.5 to 3 hours, about 12.5 km |
| Power | |
| Battery | Dual-bay system, 9000 mAh (453.6 Wh) per battery, 18000 mAh (907.2 Wh) with two |
| Charging | About 1 hour per battery |
| Operating temperature | -20 to 55 °C |
| Sensing and computing | |
| LiDAR | 1 (Standard), 2 front and rear (Pro) |
| Camera | 1 wide-angle camera, expandable to 2 |
| Computing | 8-core CPU (platform) and Intel Core i7 (user development). Pro adds a high-performance expansion dock for 3 computing units |
| Pro navigation | SLAM mapping and autonomous navigation, wireless vector positioning, GPS, and 4G |
| Protection rating | IP56 (Standard), IP56 to IP67 with IP67 core components (Pro) |
| Connectivity and development | |
| Wireless | Wi-Fi 6, Bluetooth 5.2 |
| Interfaces | 2 × RS485, 2 × CAN, 2 × Gigabit Ethernet, 4 × USB 3.0 Type-C, 12 V, 24 V, and battery power outputs |
| Development | High-level and low-level secondary development, with robot models and simulation interfaces for environments such as Isaac Sim |
| Warranty | |
| Coverage | 1 year |
Source: Unitree Robotics published specifications and Stokes Robotics product data for the A2-W. Configuration options change what is installed. Your quote lists the exact configuration.
Choose your starting point
What's included
Out of the box, and what you can add
Unitree A2-W robot
Standard or Pro
Battery
9000 mAh (453.6 Wh)
Battery charger
58.8 V, 7 A
Remote controller
Handheld
Onsite Setup and Training
We set up the robot at your site and train the people who will run it. Training materials included.
+ $5,000.00
Online Training
Online training for the people who will run the robot, with training materials included.
+ $2,500.00
Battery and Controller Upgrade (A2)
Two extra batteries, a digital controller, and a joystick controller for the Unitree A2 and A2-W.
+ $3,000.00
Connectivity Package
A laptop with preloaded software, a Wi-Fi router that gives the robot its own stand-alone network, and a phone for touch-screen control and a live camera view.
+ $5,000.00
STEMBOTICS Curriculum License
STEMBOTICS curriculum license for classroom robotics programs, from a Stokes Robotics team that has written robotics curriculum since 2013.
+ $4,000.00
What Stokes Robotics adds
More than the hardware
Secondary development
Our Stokes packages come with software and hardware set up for the way you will use the robot.
Curriculum
Our team has written STEM curriculum since 2005 and robotics curriculum since 2013.
Training
Onsite and online training for the people who run the robot day to day.
Buying
Two ways to buy Unitree A2-W
Buy online
Checkout now
- Choose your configuration and add-ons
- Check out securely online
- We prepare your robot before it ships
- Training is scheduled if you added it
Request a quote
Buy through your organization
- Tell us where the robot will work
- We talk through your site and configuration
- You get a written quote for approval
- The robot ships once the order is placed
Questions
Unitree A2-W FAQ
The A2-W adds wheels to the legs and uses 16 degrees of freedom instead of 12. It weighs about 52 kg with battery and reaches up to about 6 m/s. The legged Unitree A2 weighs about 37 kg with dual batteries.
The Pro has every Standard feature plus a second LiDAR, a wireless vector positioning module, GPS, 4G, and a high-performance expansion dock. It adds SLAM mapping and autonomous navigation, with IP67-rated core components.
About 4 to 5 hours and about 20 km without a load, and about 2.5 to 3 hours and about 12.5 km with a 25 kg load, on the dual-battery system.
Yes. It supports high-level and low-level secondary development, with an Intel Core i7 dedicated to user development and simulation interfaces for environments such as Isaac Sim.
Yes. We offer onsite setup and training and online training for the people who will run the Unitree A2-W, before and after the sale. Both are optional add-ons you can choose at checkout or in your quote request.
Yes. Choose your configuration, add-ons, and quantity, then check out online. If your school, agency, or company needs a purchase order or a formal quote, request a quote and our sales team will build it with you.
Related robots
You might also consider
Aero-W
Aero-W is the Stokes Robotics wheel-legged security and inspection robot dog package built on the Unitree A2-W, used in our Security and Inspections Robotic Assistant System (SIRAS).
Aero
Aero is the Stokes Robotics security and inspection robot dog package built on the Unitree A2, used in our Security and Inspections Robotic Assistant System (SIRAS).
SHEP
SHEP is the Stokes Robotics robot dog package built on the Unitree Go2, set up for your industry and job, with curriculum and training options for schools, agencies, and companies.
SHEP-W
SHEP-W is the Stokes Robotics wheel-legged robot dog package built on the Unitree Go2-W, set up for inspection, public safety, and research work before it ships.
Next step
Put Unitree A2-W to work
Order online today, or tell us where the robot will work and our sales team will put together a quote.