Unitree A2 (Stellar Explorer)is Unitree Robotics' next-generation industrial-grade quadruped robot, designed as a versatile, high-performance mobile platform for demanding applications like logistics, industrial inspection, emergency rescue, exploration, research, and development.

It balances agility, endurance, heavy payload capacity, and advanced perception in a relatively lightweight package, with options for wheel-leg configurations and strong developer support for customization.

Key Specifications

Mechanical Parameters (applies to both standard A2 and A2-PRO unless noted):

• Dimensions: Standing: 820 × 440 × 570 mm; Lying prone: 720 × 550 × 220 mm.
• Weight: ~31–35 kg without batteries; ~37–42 kg with dual batteries.
• Degrees of Freedom: 12 (3 per leg).
• Joint Motors: Low-inertia, high-speed inner rotor PMSM with dual encoders and industrial-grade crossed roller bearings.
• Peak Joint Torque: Approx. 180 N·m.
• Material: Aluminum alloy + high-strength engineering plastic.

Load Capacity:

• Standing load: Up to ~100 kg.
• Continuous walking load: ~25 kg (potentially up to ~35 kg under ideal conditions).

Mobility & Performance:

• Max speed: 0–3.7 m/s (up to ~5 m/s or ~11 mph in some conditions; wheel-leg option enhances this).
• Terrain capabilities: Max slope ~45°; max step height 30 cm; obstacle climb ~0.5–1 m.
• Endurance: Unloaded — >5 hours continuous walking / ~20 km; with 25 kg load — >3 hours / ~12.5 km. Dual hot-swappable batteries (single: 9000 mAh / 453.6 Wh; dual: 18,000 mAh / 907.2 Wh).

Sensors & Perception:

• Standard A2: 1× industrial LiDAR + HD camera + front light.
• A2-PRO: 2× industrial LiDARs (front & rear) for dual-sided/360° perception with minimal blind spots + HD camera + front light.
• Additional: Microphone array, speaker, optional wireless vector follow, GPS, 4G.

Computing & Interfaces:

• Standard: 8-core high-performance CPU (platform) + Intel Core i7 (user development); optional high-compute expansion.
• Interfaces: RS485 ×2, CAN ×2, Gigabit Ethernet ×2, USB 3.0 Type-C ports, power outputs (12V/24V/BAT).
• Connectivity: Wi-Fi 6, Bluetooth 5.2.
• Operating temperature: -20°C to 55°C.
• Protection: IP56 (chassis); up to IP67 for core components.

Other Features:

• Hot-swappable dual batteries for uninterrupted operation.
• Wheel-leg option available for enhanced performance.
• Continuous OTA updates and full support for secondary development (ROS-compatible, open platform).
• Warranty: 12 months.

Availability & Pricing

The Unitree A2 is available for purchase, with pre-orders or direct sales through Unitree's official shop and authorized resellers. Official pricing often requires contacting sales (e.g., listed around $100,000 USD on the Unitree shop, contact sales for quotes). Reseller prices for standard/pro models typically range from ~$29,000–$39,000 USD depending on configuration, though these can vary and may be subject to change.

Delivery timelines vary; some resellers noted potential early 2026 availability for certain batches as of mid-2025 launches. Contact Unitree sales (sales_global@unitree.cc) for custom industry solutions, exact quotes, shipping (duties extra), and availability in your region.

This robot stands out for industrial and field use due to its combination of payload, range, terrain-handling, and perception capabilities while remaining developer-friendly. For the latest details, visit the official Unitree site (unitree.com or shop.unitree.com).