Unitree A2

Industrial quadruped, “Stellar Explorer” platform
~37 kg with batteries (31 kg without)
Dual hot-swappable batteries: 9,000 mAh each (18,000 mAh total)
Endurance: ~5 h / ~20 km no-load; ~3 h / ~12.5 km with 25 kg load
Load: ~100 kg max standing; ~25 kg continuous walking
Speed: 0–3.7 m/s (up to ~5 m/s)
Sensing: dual LiDAR (front & rear) + HD camera + front light
IP rating: IP56 overall (core components up to IP67)
Terrain: ~45° slope, 30 cm step, 0.5–1 m climb
Compute & I/O: 8-core CPU + Intel Core i7 (dev), Wi-Fi 6/BT 5.2, RS485×2, CAN×2, GbE×2, USB-C×4, 12V/24V/BAT power out
Options: wheel-leg kit, GPS/4G, vector-follow module

Description

Category	Parameter	A2 (Standard)	A2-PRO
Mechanical	Size (standing)	820 × 440 × 570 mm	820 × 440 × 570 mm
	Size (lying)	720 × 550 × 220 mm	720 × 550 × 220 mm
	Material	Aluminum alloy + high-strength engineering plastic	Same
	Weight (no battery)	≈31 kg	≈31 kg
	Weight (with battery)	≈37 kg	≈37 kg
	DoF (motors)	12	12
	Joint bearings	Industrial crossed-roller	Same
	Joint motors	Low-inertia, high-speed inner-rotor PMSM	Same
	Max joint torque	≈180 N·m	≈180 N·m
	Range of motion	body −58°~58°; thigh −134°~180°/−89°~~225°; shank −158°~~−30°	Same
Electrical	Supply voltage	50.4 V	50.4 V
	Encoders	Dual encoders	Dual encoders
	Cooling	Local air cooling	Local air cooling
	Power slots	Dual slots, dual batteries	Dual slots, dual batteries
	Battery capacity	Single 9000 mAh (453.6 Wh); Dual 18000 mAh (907.2 Wh)	Same
Connectivity & I/O	Wireless	Wi-Fi 6, Bluetooth 5.2	Same
	Audio	Speaker; microphone array	Same
	Lights	Front light	Front light
	Optional modules	Vector-follow (optional), GPS (optional), 4G (optional)	Vector-follow (optional), GPS (optional), 4G (optional)
	Interfaces	RS485×2, CAN×2, GbE×2, USB-C (CPU)×2, USB-C (i7)×2; power out 12V/24V/BAT	Same
Sensing	Sensors	1× LiDAR + 1× HD camera	2× LiDAR + 1× HD camera
Compute	Onboard compute	8-core high-perf CPU (platform) + Intel Core i7 (user dev)	Same (high-compute dock optional)
Performance	Operating temp	−20 °C ~ 55 °C	−20 °C ~ 55 °C
	Endurance / range	>5 h no-load (~20 km)	>5 h no-load (~20 km)
		>3 h with 25 kg (~12.5 km)	>3 h with 25 kg (~12.5 km)
	Max standing load	≈100 kg	≈100 kg
	Continuous walking load	≈25 kg	≈25 kg
	Slope capability	≈45°	≈45°
	Stairs	Max step height 30 cm	30 cm
	Max climb height	≈0.5–1 m	≈0.5–1 m
	Speed	0–3.7 m/s (up to ~5 m/s)	Same
	Wheel-leg kit	Optional	Optional
Protection & Support	Ingress rating	IP56	IP56–IP67 (core components IP67)
	Updates & SDK	Smart OTA; secondary development supported	Same