Unitree B2

At the top of every product ladder sits the machine built for the places that destroy the others, and in Unitree's dog line that machine is the Unitree B2: a 60 kilogram, IP67 sealed quadruped flagship engineered under the banner "go beyond the limits," running up to 6 meters per second, the fastest industrial grade quadruped built, on 360 newton meter joints representing a 170 percent leap in joint performance over its predecessor, through the flooded, frozen, scorching and dust choked sites, minus 20 to 55 Celsius, where energy, mining, heavy industry and defense adjacent missions actually happen.

The B2's specification reads like a list of reasons lighter machines get recalled from hard sites: full IP67 ingress sealing rather than splash ratings, payloads to 40 kilograms, endurance past four hours with quick change batteries and optional autonomous charging for unattended operation, sustained stair climbing and stability on the slippery and broken ground that Unitree calls out by name, and, uniquely in its class, optional switching between legged and wheeled forms, the B2-W's hybrid answer for sites that mix kilometers of road with terrain no wheel survives.

Above the workhorse A2 and the portable AS2, the B2 is where the dog line meets its hardest customers. The Unitree B2 for sale, with full specifications, can be explored through this page.

Background

Built for the sites that filter machines

The B2 exists because industrial reality filters robots brutally: rain becomes immersion, dust becomes abrasive fog, temperature swings past what consumer batteries tolerate and distances stretch past what demonstration endurance covers. Unitree's answer was to engineer the flagship from the environment backward, IP67 sealing throughout, a thermal envelope spanning 75 degrees, joint torque rebuilt 170 percent stronger and the computing to navigate autonomously where GPS, light and networks all fail, producing the machine that made Unitree credible in the energy, infrastructure and public sector deployments the category's economics run through.

The speed nobody expected from a heavyweight

The B2's headline contradiction is its pace: 60 kilograms moving at 6 meters per second, faster than any industrial quadruped built, speed that reads as spectacle and deploys as coverage, longer patrol circuits per charge, faster response to alarms, terrain crossed before conditions change, the athletic inheritance of the company whose machines hold the category's records at every scale.

Technical Specifications

Figures follow published specifications; payload, endurance and options vary by configuration and mission profile and are confirmed at quotation.

How does the B2 differ from the A2?

Severity, and the budget that answers it. The A2 is the daily route workhorse, 37 kilograms, 25 kilogram loads, hot swap continuity, IP56 weatherproofing, right for plants, estates and rounds where weather is an inconvenience. The B2 is for sites where weather is an adversary: full IP67 immersion class sealing against the A2's splash rating, 360 against 180 newton meters, 40 against 25 kilograms of payload, 275 TOPS of onboard AI against CPU class computing, six meters per second against five and the wheel leg option for mixed ground at scale. The decision rule the ladder teaches: buy the AS2 to carry the tools, the A2 to run the route, and the B2 when the site itself is the hardest part of the job.

Technology

Joints rebuilt for the flagship's mass

The 360 newton meter actuators, a 170 percent generational leap, are what let 60 kilograms move like a middleweight: sprint speed, sustained stair climbs, recovery on ice and rubble, and the payload margins that keep 40 kilograms of sensors, communications or cargo stable through dynamic motion, Unitree's self developed motor lineage at its heaviest and strongest.

275 TOPS in the field

The onboard NVIDIA Jetson AGX Orin delivers 275 TOPS of AI computing, workstation class perception living in the machine: dual 3D LiDAR fused into SLAM and autonomous navigation through GPS denied plants, tunnels and structures, obstacle intelligence at sprint speeds and the headroom for the custom autonomy and analytics payload developers deploy through the full SDK and ROS 2 stack, improving by OTA update.

Uptime engineered for unattended sites

The power architecture serves deployments humans rarely visit: quick change batteries turning in seconds, endurance past four hours per cycle and the optional autonomous charging solution that closes the loop entirely, the B2 running its rounds, docking itself and returning to duty, continuous operation at remote sites as a configuration rather than a project.

Two mobility modes, one machine

The optional legged wheeled switching, realized in the B2-W, resolves the oldest field robotics compromise: wheels for the kilometers of access road and paved plant, legs for the stairs, rubble and terrain at the destination, one asset covering the whole journey to the work, within Unitree's support ecosystem and cross brand mission software like RoboPatrol and RoboInspect in the robot software catalog.

What is the Unitree B2 used for?

1. Energy and utilities inspection: substation, plant and pipeline rounds across inspection robotics in the weather that grounds lighter machines.
2. Mining, oil and gas: the IP67, wide temperature missions across heavy industrial sites where sealing is survival.
3. Security and perimeter patrol: high speed circuits across security robotics, six meter per second response with 275 TOPS of onboard analysis.
4. Emergency and disaster response: reconnaissance and equipment carry across emergency response robotics, into the conditions the envelope was rated for.
5. Defense adjacent and government missions: rugged autonomous mobility across government robotics applications.
6. Heavy logistics and research: 40 kilogram transport across logistics routes and flagship platform work across research robotics, within the wider quadruped category.

Pricing and Availability

The Unitree B2 is available for purchase worldwide across its configurations including the wheel leg B2-W, from single units to fleet programs with autonomous charging infrastructure, alongside the full dog line and Unitree catalog on Robots International. Unitree B2 price and cost vary by configuration, mobility options, payloads and destination, so buyers seeking the B2 for sale should request a current quotation for their requirements. Purchasing inquiries, specification sheets and availability details for those looking to buy the Unitree B2 can be found on this page.

Frequently Asked Questions

What is the Unitree B2?

The B2 is Unitree's extreme environment quadruped flagship: a 60 kilogram, IP67 sealed robot dog with 360 newton meter joints, speeds to 6 meters per second, payloads to 40 kilograms, dual 3D LiDAR perception, 275 TOPS of NVIDIA Jetson AGX Orin computing and optional legged wheeled form switching as the B2-W.

How does the Unitree B2 work?

The B2 navigates autonomously by SLAM on dual 3D LiDAR with 275 TOPS of onboard AI, moves on 360 newton meter self developed joints through learning trained control, endures past four hours per quick change battery with optional autonomous self charging, and opens to development through full SDK and ROS 2 support with OTA updates.

Why is the Unitree B2 important?

It is where the quadruped category proves industrial seriousness: immersion class sealing, a 75 degree thermal envelope, the class's fastest speed and heaviest working payloads, the machine that carried robot dogs into the energy, mining and public sector deployments that define the category's real economics.

What are the benefits of the Unitree B2?

Key benefits include survival grade IP67 protection across a minus 20 to 55 Celsius envelope, the fastest industrial quadruped speed at 6 meters per second, 40 kilogram payloads on 360 newton meter joints, workstation class 275 TOPS onboard AI, unattended operation through autonomous charging and the unique wheel leg switching option.

How fast is the Unitree B2?

Up to approximately 6 meters per second, which Unitree cites as the fastest running industrial grade quadruped robot, pace that converts directly into longer patrol coverage, faster alarm response and quicker terrain transits at full flagship mass.

What is the difference between the B2 and B2-W?

The B2-W realizes the platform's optional mobility switching: wheeled form for roads, floors and distance, legged form for stairs, rubble and terrain, changed as ground demands, one machine covering mixed sites that would otherwise need two.

Where can I buy the Unitree B2 and what does it cost?

The B2 is for sale through Robots International, serving markets worldwide with delivery, customs clearance and support. Because cost varies by configuration, options and infrastructure, buyers should request a tailored quotation. Full purchasing details are available on this page.

Summary

The Unitree B2 is the dog built for the days that cancel everything else: sealed to IP67 against the flood and the dust, rated from deep frost to furnace heat, sprinting at six meters per second under forty kilograms of mission, thinking with 275 TOPS behind dual LiDAR eyes, swapping batteries in seconds or charging itself unattended, and switching between legs and wheels as the ground dictates. At the summit of the line that runs from the Go2's living rooms through the AS2's carry cases and the A2's daily routes, the B2 is where Unitree's quadruped decade meets its hardest work. As the extreme environment flagship of robot dogs, the Unitree B2 stands as the definitive machine for going beyond the limits.

v3, August 9, 2026