1.3 REPLACEABLE BRUSH HEADS: The kitchen cleaning brush includes 3 replacement brush heads. The hard bristle brush is suitable for cleaning stovetops, ovens, and other crevices. The steel wire ball is ideal for pot and pan bottoms, grease, hood grooves, and other heavily soiled areas. The peplum cloth is designed for large flat surfaces like ceramic tiles and bathrooms. 2. WATERPROOF DESIGN: The rotary scrubber features a professional ultrasonic structure with an IPX7 waterproof rating. This design ensures safe operation in wet conditions, such as bathtubs, sinks, and more. (Do not submerge the head directly in water.) 3. LONG BATTERY LIFE: Powered by a builtin 1200mAh lithium battery, the scrubber offers approximately 34 hours of runtime via the included USB TypeC cable. Activate it with a single button press to tackle stubborn dirt. (Avoid overuse and restart if it shuts off automatically.) 4. PORTABLE DESIGN: The electric cleaning brush is wireless and compact, ensuring easy access and hassle cleaning. It allows for freedom to clean anytime, anywhere— for air conditioners, kitchen appliances, countertops, ovens, sinks, glass, and tiles.