Unitree B2 Quadruped Robot

Mobility-first chassis and actuation

B2 uses a compact, serviceable four-leg layout with high-torque joints and impact-tolerant mechanics intended for stairs, rubble, and slopes. Unitree cites >6 m/s peak running, >1.6 m long jump, and robust stair performance up to 40 cm step height with >45° slope handling—figures positioned for aggressive field trials rather than lab-only demos. The platform’s max joint torque ~360 N·m (family reference) underpins disturbance rejection and dynamic gaits on uneven terrain.

Payload and endurance

A distinguishing trait is B2’s load envelope: standing load up to ~120 kg and sustained walking load >40 kg, paired with >5 h unloaded continuous walking (and >4 h with ~20 kg load), supporting long patrols with substantial sensor or comms payloads. 

Environmental protection

For outdoor deployments, Unitree lists IP67 ingress protection on the B2 product page—useful against dust and short-term immersion, and notable among legged robots aimed at industrial settings. 

Perception and I/O

Reference configurations include 3D LiDAR ×1 + depth cameras ×2 + optical cameras ×2 (bundle-dependent), enabling 3D mapping and obstacle detection. An extensive connector set (4× 1 GbE, 4× USB 3.0, 12 V/24 V auxiliary power, battery out) simplifies integration of third-party payloads such as thermal imagers, gas sensors, or pan-tilt modules. 

Compute for platform and users

Baseline processing pairs an Intel Core i5 (platform functions) with Intel Core i7 (user development); optional upgrades add Jetson Orin NX modules (up to three) for onboard AI pipelines (vision, SLAM, imitation-learning policies). This split lets organizations run their autonomy stack without external compute bricks. 

Technology and Specifications

Core platform (representative; configuration-dependent)

• Max speed: >6 m/s (special configuration; safety-limited in practice)

• Ingress protection: IP67

• Long jump: >1.6 m

• Step / slope: up to 40 cm steps, >45° ramps

• Loads: standing ~120 kg, sustained walking >40 kg

• Endurance: unloaded >5 h, ~20 kg load >4 h

• Perception: 3D LiDAR (×1) + depth (×2) + RGB (×2) (varies by kit)

• User I/O: 4× 1 GbE, 4× USB 3.0, 12 V×4, 24 V×4, 5 V×1, BAT×1

• Compute (base): Intel Core i5 + i7; optional up to 3× Orin NX 

Dimensions and battery (examples from datasheets/resellers)

Third-party brochures list a body size around ≈1098 × 450 × 645 mm and note quick-change batteries with support for autonomous charging options; reseller listings cite ~45 Ah / ~2250 Wh packs for 4–6 h missions (scenario-dependent). Exact values vary by bundle and year.

Developer resources

Unitree provides a B2 SDK / developer portal with kinematics, coordinate frames, and control APIs to support secondary development (motion control, state estimation, perception). 

Specification note: Published numbers may vary by production batch, firmware, and regional kit. Always verify current datasheets and packing lists for your order. 

Applications and Use Cases

Industrial inspection and autonomous patrols

With long endurance, heavy sustained load, and IP67 sealing, B2 is positioned for power-grid, petrochemical, and factory inspections, as well as campus/security patrols. Payload capacity allows thermal cameras, multi-gas analyzers, or 5G/mesh relays without exceeding walking limits. 

Emergency-response training and reconnaissance

High speed, stair performance, and slope handling make B2 suitable for SAR drills, rubble reconnaissance, and post-event assessment, where mobility and fault tolerance matter more than pristine lab conditions. 

Construction, mining, and large-site mapping

B2’s sensor options (LiDAR + cameras) and stable payload carriage enable 3D mapping/SLAM in large, cluttered sites, with multi-hour missions minimizing swap interruptions. 

Advanced research (legged autonomy & embodied AI)

The split compute architecture and optional Orin NX accelerators support on-robot learning, dense perception, and planning research without tethered compute. The SDK helps labs integrate custom gait controllers, state estimators, and semantic perception stacks. 

Advantages / Benefits

• Performance headroom: >6 m/s peak and >1.6 m long jump provide dynamic reserves for disturbance recovery and rapid response. 

• Work-class payloads: >40 kg sustained walking load and ~120 kg standing load enable meaningful multi-sensor payloads and power budgets. 

• Field robustness: IP67 sealing, stair/slope capability, and multi-hour endurance are aligned with outdoor/industrial duty rather than classroom demos. 

• Integration-ready I/O: Multiple Ethernet/USB ports and auxiliary power rails reduce the need for custom harnessing. 

• Developer-friendly: Dedicated “user” compute (Core i7) and optional Orin NX modules simplify deploying perception/AI pipelines onboard. 

Comparisons (if relevant)

• B2 vs. A2: A2 emphasizes all-day endurance with dual-LiDAR coverage and lower mass; B2 targets higher top speed, heavier loads, and tougher ingress protection for harsher environments. Selection depends on payload/ruggedness needs versus weight/range priorities. 

• B2 vs. Go-series (Go1/Go2): Go-series quadrupeds prioritize accessibility and education; B2 is engineered for industrial inspection with IP67, multi-hour loaded walking, and significantly higher standing/sustained loads. 

Pricing and Availability

Unitree’s official shop lists B2 with a headline “$100,000 USD” placeholder and invites buyers to contact sales for the real price (regional duties and shipping extra). Resellers publish kit pricing or “contact us” quotes, including bundles with LiDAR and extended support. Lead times and configurations (e.g., compute upgrades, chargers, autonomous docking) vary by region. 

FAQ

What is the Unitree B2?
An industrial-grade quadruped robot designed for long-endurance missions with high payloads, IP67 protection, and >6 m/s peak speed in special configurations. How does the B2 handle sensing and compute?
Reference kits pair 3D LiDAR and multiple cameras with platform compute (Core i5) and user compute (Core i7), expandable with Jetson Orin NX modules for AI workloads. 

Why is B2 important for industry?
It combines sustained load (>40 kg), multi-hour walking, and IP67 sealing, enabling real inspections and patrols—beyond short demos—while supporting on-robot AI and SLAM.

What battery/endurance options exist?
Datasheets and reseller pages note quick-change batteries, support for autonomous charging, and large-capacity packs (≈45 Ah / 2250 Wh) yielding ~4–6 h depending on load and terrain. Verify your bundle.

Summary

The Unitree B2 advances legged robotics for real-world deployments: IP67 protection, >6 m/s peak speed, >40 kg sustained walking load, and multi-hour endurance position it for inspection, patrol, mapping, and research at scale. With modular sensors, rich I/O, and expandable compute (Core i7 + optional Orin NX), B2 serves organizations seeking an integration-ready quadruped capable of carrying meaningful payloads across demanding terrain.