Remote-controlled electric brushing machine for HVAC air duct cleaning and video inspection. Suitable for 300–900 mm (12–35 inch) air ducts. Brush rotation speed: up to 480 rpm. Climbing capability: up to a 45-degree angle. Cameras: front and rear HD color cameras. Electric cable length: 21 meters. Power supply: 100–230 V, 50/60 Hz. Weight: 12 kg. Dimensions: 20 × 28 × 49 cm.