Integrating mechanic, electronic, and hydraulic control technology with CAN bus interface design, cab-less XE15R (Little Swan) measures 1.35 m tall and 1.08 m wide. Unmanned driving reduces labor intensity, specifically in severe operating environments with toxic conditions or extreme temperatures, and self-learning function can save operating maneuvers then replay them automatically on request. Affording agility and flexibility, excavator's wireless control function has 100 m range.