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2.4G R/C13CHANNELS ASSEMBLED BULLDOZER (133 ACCESSORIES, BUILT-IN 6 POWER UNITS, AI PROGRAMMED SOUND EFFECTS? ? 13 CHANNELS: FRONT, BACK, LEFT, RIGHT, SOUND EFFECTS, EXTENSION AND RETRACTION OF THE UPPER ARM, EXTENSION AND RETRACTION OF THE LOWER ARM, LEFT AND RIGHT ROTATION OF THE PAN TILT, AND EXTENSION AND RETRACTION OF THE BUCKET）