Model BJ-500 Crawler Spider Crane (6.1T-class, 6100kg self-weight): Remote Control - Safety Redefined—wireless remote keeps workers away from hazardous zones! Boasts 15m max operating radius, 17m max lift height, and 5-section 4m boom (4.5m-17m, 54sec extension, customizable). 12m/min hook speed (4 ropes), Yunnei 490 diesel engine (electric start, -5℃~40℃, 8L tank). 300mm-wide crawlers, dual-speed hydraulic drive (0-2.5km/h), 25 climbing, 360 continuous slewing. Optional remote control/torque controller/basket/fly jib. Ideal for construction, factory maintenance—safe, high-performance for heavy lifting needs!