The Topsky Tianlong Conquest 4BD is a fast-traveling tracked firefighting robot associated with the RXR-MC4BD class of explosion-proof machines, which combine high-expansion foam firefighting, remote-controlled mobility, and multi-sensor reconnaissance. Capable of reaching approximately 5.51 km/h (about 1.81 m/s), it pairs a long-range water cannon with a high explosion-proof grade engineered for environments where flammable vapours or combustible hazards may be present. Technical literature for the RXR-MC4BD describes explosion-proof ratings for both the overall unit and the battery system, reflecting a design intent to support operations in settings such as petrochemical areas and gas storage tanks, where ignition risk can escalate rapidly.

Its tracked chassis is optimized for stability and traction on wet, slippery, foam-covered, or debris-obstructed industrial surfaces, with published figures citing high climbing capability of roughly 40 degrees (about 83.9 percent gradeability) and a wading depth of at least 500 mm. A high-expansion foam mechanism atomizes a pressure foam mixture through a nozzle and foam net to generate high-multiple bubbles that can blanket burning surfaces, isolating fuel from oxygen and suppressing vapours where water alone may be less effective. The 4BD also supports up to 8-gas detection plus two environmental parameters, fireground logistics such as towing two DN80 charged hoses for at least 80 m, and cloud-connected reporting of position, battery level, audio, video, and gas readings over 4G/5G networks for coordinated industrial firefighting.