Unitree B2 is an advanced industrial-grade quadruped (four-legged) robot from Unitree Robotics, designed for demanding applications like inspection, emergency response, security patrols, exploration, and research. It excels in rough terrain, stair climbing, obstacle navigation, and payload carrying, with strong endurance and high mobility. 

Key Technical Specifications

Dimensions: Standing ≈ 1098 mm × 450 mm × 645 mm; Prone/Lying ≈ 880 mm × 460 mm × 330 mm. 

Weight: ≈ 60 kg (including battery). 

Degrees of Freedom (DOF): 12.
Max Running Speed: > 6 m/s (note: safety-limited in practice; special configurations). 

Max Joint Torque: ≈ 360 N·m.
Max Jump Distance: > 1.6 m.
Ditch Jumping Width: 0.5–1.2 m.
Payload Capacity: Standing load ≥ 120 kg; Continuous walking load > 40 kg. 

Terrain Capabilities: Max obstacle crossing ≈ 40 cm; Continuous stair climbing (20–25 cm steps, up to 40 cm forward); Slope angle > 45°.
Battery: 45 Ah (2250 Wh), 58 V; Quick-swap capable. Optional autonomous charging.
Endurance: Unloaded walking > 5 hours (> 20 km); 20 kg load > 4 hours (> 15 km); Overall 4–6 hours depending on use. 

Operating Temperature: -20°C to 55°C.
Ingress Protection: IP67 (dust and water resistant).
Computing (Standard): Intel Core i5 (platform) + Intel Core i7 (user development). Optional: Additional Intel i7 or NVIDIA Orin NX (up to 3 units).
Sensing: Typically includes 3D LiDAR (×1), depth cameras (×2), and optical cameras (×2); configurations vary. 

Interfaces: Multiple 1000M Ethernet, USB 3.0, power outputs (12V, 5V, 24V, BAT).
Other Features: Excellent terrain adaptability; optional wheeled foot modules (B2-W variant) for hybrid mobility; continuous OTA updates; SDK for development.

Note: The B2-W is a wheeled variant with added wheels for higher speeds on flat surfaces and slightly different specs (e.g., ~75 kg weight). 

Price

Official Unitree Shop: Listed at $100,000 USD (contact sales for the actual/negotiated price; customizable). 

Resellers: Often lower, e.g., starting around $78,700–$85,900 USD depending on configuration (base model, LiDAR options, etc.). Prices may include shipping in some cases but exclude duties/taxes. 

Prices vary with options (e.g., extra batteries, advanced computing, sensors, software licenses) and volume. Contact Unitree or authorized distributors for quotes.

Availability for Purchase

Available for purchase directly from the official Unitree shop (shop.unitree.com) or authorized resellers (e.g., RoboWorks, RoboStore, Robots International). 

Lead times: Often "ready to ship" for standard configs or 60 days (or more) depending on customization and stock.
Primarily targeted at businesses, research, and industrial users. It is a civilian robot—comply with local laws, and avoid dangerous modifications. 

Global shipping is available (duties/customs typically buyer responsibility).

For the latest details, exact pricing, demos, or configuration options, visit the official site (unitree.com or shop.unitree.com) or contact Unitree sales directly. Specs can vary slightly by configuration and firmware updates.