Unitree A2

Industrial robots are bought on a different question than consumer ones: not what can it do, but what can it do all shift, every shift. The Unitree A2, launched in 2025 under the name Stellar Explorer, is Unitree's answer built entirely around that question: a roughly 37 kilogram quadruped that carries 25 kilograms while walking and supports 100 standing, covers up to 20 kilometers and five hours on a charge, and, decisively, swaps its dual parallel batteries without stopping, hot swap mid mission, the eternal heart, in Unitree's own phrase, for the logistics routes, inspection rounds and rescue deployments where the work does not pause for charging.

The A2 introduced itself the way Unitree products do, physically: launch footage of the machine crashing through a glass barrier, backflipping, dancing on four legs, then two, then one, and padding over rock, 180 newton meter joints making the point that industrial and agile are not opposites. Underneath the theatrics sits the working spec: 45 degree slopes, 30 centimeter steps, obstacles to a meter, speeds reaching 5 meters per second, dual front and rear 3D LiDAR for 360 degree perception, an IP56 chassis with IP67 sealed internals and a minus 20 to 55 Celsius envelope, the robot for the sites where weather is a coworker.

In the dog line, the A2 is the heavy middle: above the lightweight AS2, below the extreme environment B2. The Unitree A2 for sale, with full specifications, can be explored through this page.

Background

The generation between

The A2 arrived in August 2025 into a lineup that bracketed industry without serving its center: the Go2 owned consumer and research territory, the B2 owned the extremes, and the daily industrial round, real payload, real range, real weather, but not mining site severity, belonged to competitors. The Stellar Explorer claimed it with a specification built like a shift plan: payload for the tools, range for the route, batteries that swap hot so the route never waits, and a developer stack, 8 core CPU plus optional Intel Core i7, ROS and ROS 2 SDK, open enough for the integrators who actually deploy such machines.

Endurance as a design religion

The A2's defining engineering choice is its power architecture: two 9,000 milliamp hour batteries in parallel, individually hot swappable while the robot keeps working, backed by what Unitree calls a triple power system for reliability across the full temperature envelope, with fast charging around one hour. The arithmetic follows: more than five hours and roughly 20 kilometers unloaded, more than three hours and about 12.5 kilometers under a full 25 kilogram payload, and, with a battery rotation, no ceiling at all, continuous operation as a standard capability rather than an option.

Technical Specifications

Figures follow published specifications; configurations vary by scenario and are confirmed at quotation.

How does the A2 fit between the AS2 and B2?

The three industrial dogs ladder by severity. The AS2 is the one person portable tier, 18 kilograms, 15 kilogram working loads, the professional round without the logistics. The A2 is the workhorse tier: sixty percent more walking payload, double the joint torque, hot swap continuous endurance and full 360 degree dual LiDAR, the machine for daily industrial routes with real cargo and real weather. The B2 is the extremes tier, 60 kilograms, IP67 throughout, 360 newton meter joints, 275 TOPS of computing, for the mining, energy and defense adjacent sites that break everything lighter. The rule: AS2 to carry the tools, A2 to run the route, B2 to survive the site.

Technology

Perception with no behind

Dual industrial 3D LiDAR units, one forward, one rear, give the A2 the 360 degree spatial awareness a machine working among vehicles, equipment and people cannot do without, fused with the HD front lit camera and inertial sensing into SLAM, autonomous navigation and AI obstacle avoidance that hold in GPS denied interiors and low light rounds alike.

Strength that stays agile

Twelve PMSM actuators at up to 180 newton meters, on industrial crossed roller bearings with wide joint ranges, deliver both halves of the A2's character: the freight numbers, 25 kilograms moving, 100 standing, meter class obstacles, and the launch video athletics, jumps, flips, balance under stress, the dynamic margin that reads as showmanship and deploys as recovery from the slips, knocks and surprises of real sites.

A platform integrators can build on

The A2 ships developer open: 8 core computing with the optional Intel Core i7 dedicated to user development, an optional high compute expansion dock, full ROS and ROS 2 SDK support, OTA updates and an industrial interface panel, dual RS485, dual CAN, dual Gigabit Ethernet, USB C and switched 12 and 24 volt payload power, the electrical hospitality that payload builders and research integrators read as an invitation, within Unitree's support ecosystem and cross brand mission software like RoboPatrol and RoboInspect in the robot software catalog.

Options that track the mission

The platform extends by configuration: optional 4G and GPS for outdoor and remote operations, wheel leg configurations for mixed ground, payload attachments on the powered interfaces, and planned Pro tier enhancements, the A2 as a chassis for missions rather than a fixed product.

What is the Unitree A2 used for?

1. Industrial inspection: daily rounds across inspection robotics, plants, substations and estates, sensors riding the powered payload rails.
2. Logistics and site transport: 25 kilogram loads over 12 kilometer routes across logistics and industrial ground.
3. Emergency rescue and response: Unitree's own named mission, reconnaissance and equipment carry across emergency response robotics in the weather the envelope was built for.
4. Security patrol: continuous perimeter rounds across security robotics, the hot swap architecture keeping the circuit unbroken.
5. Reconnaissance and exploration: terrain work at meter class obstacles across field and government missions.
6. Research and development: the open industrial platform for payload, autonomy and field robotics programs, within the wider quadruped category.

Pricing and Availability

The Unitree A2 is available for purchase worldwide across its configurations and options, from single units to fleet programs, alongside the full dog line and Unitree catalog on Robots International. Unitree A2 price and cost vary by configuration, compute options, attachments and destination, so buyers seeking the A2 for sale should request a current quotation for their requirements. Purchasing inquiries, specification sheets and availability details for those looking to buy the Unitree A2 can be found on this page.

Frequently Asked Questions

What is the Unitree A2?

The A2 is Unitree's industrial grade quadruped, launched in 2025 as the Stellar Explorer: a roughly 37 kilogram robot dog carrying 25 kilograms while walking and 100 standing, running up to 5 meters per second across 45 degree slopes and meter class obstacles, with dual 3D LiDAR perception and hot swappable dual batteries.

How does the Unitree A2 work?

The A2 navigates by SLAM on its front and rear 3D LiDAR with HD front lit camera vision, moves on twelve 180 newton meter PMSM joints under learning trained control, runs more than five hours and 20 kilometers per charge with mid mission battery hot swapping, and opens to development through its 8 core CPU, optional Intel Core i7 and ROS and ROS 2 SDK.

Why is the Unitree A2 important?

It claimed the industrial middle: real payload, real range and continuous hot swap endurance in a machine tougher than consumer dogs and far lighter and more affordable than extreme environment flagships, the daily route tier where most working quadruped deployments actually live.

What are the benefits of the Unitree A2?

Key benefits include 25 kilogram working and 100 kilogram standing loads, uninterrupted operation through hot swap dual batteries, 360 degree dual LiDAR awareness, a minus 20 to 55 Celsius all weather envelope with IP56 and IP67 protection, meter class terrain capability, a fully open developer and payload platform and the ecosystem of the quadruped market leader.

How long does the Unitree A2 run on a charge?

More than five hours and roughly 20 kilometers unloaded, or more than three hours and about 12.5 kilometers under a full 25 kilogram payload, with the dual parallel batteries individually hot swappable while the robot keeps working and fast charging in around one hour, making continuous rotation operation standard.

What is the difference between the A2, AS2 and B2?

Severity tiers: the AS2 is the 18 kilogram one person portable professional dog, the A2 the 37 kilogram workhorse with double its torque and payload plus hot swap endurance, and the B2 the 60 kilogram extreme environment flagship with IP67 sealing throughout, 360 newton meter joints and 275 TOPS computing.

Where can I buy the Unitree A2 and what does it cost?

The A2 is for sale through Robots International, serving markets worldwide with delivery, customs clearance and support. Because cost varies by configuration and options, buyers should request a tailored quotation. Full purchasing details are available on this page.

Summary

The Unitree A2 is the robot dog specified like a shift roster: twenty five kilograms on its back, twenty kilometers in its legs, batteries that change over without the mission noticing, and a sensing ring with no blind side, wrapped in weatherproofing rated for the year's worst days and joints strong enough to flip for the cameras and recover on the rocks. The Stellar Explorer runs the industrial middle of Unitree's dog line, above the carryable AS2, beneath the extreme B2, exactly where the daily working round lives. As the workhorse tier of quadruped robotics, the Unitree A2 stands as the definitive route machine of its generation.

v3, August 9, 2026