Model Name: Electric Back Bath Brush Upper and lower adjustable height 15cm/5.91 Product size 40.6*15.3cm/15.98*6.02 Brush disc diameter: 30cm/11.81 inches Battery capacity: 5200 mAh Charging time: 4.5 hours Rated voltage: 7.4V Gear: 3-speed adjustment Waterproof rating IPX7 Description Ergonomic design: Adjustable height up and down up to 15cm, easy to use no matter how tall or short you are, ensuring that every corner of your back is effectively cleaned. Large Brush Disc: 30cm diameter brush disc provides full coverage and delivers ideal results in a single cleaning, saving time and effort. Long-lasting battery life: Equipped with a high-capacity 5200 mAh battery, it can support long-time use after a single charge, reducing the trouble of frequent charging. Multi-Speed Adjustment Function: 3-speed adjustment to meet the needs of different skin types, from mild to powerful, users can choose the most suitable cleaning mode according to personal preference. PREMIUM WATERPROOF PERFORMANCE: IPX7 waterproof design makes this back shower brush not only safe to use in the shower, but also can be rinsed directly with water, convenient, hygienic and easy to maintain. EASY INSTALLATION: Made of strong environmentally friendly waterproof adhesive, no need to drill holes, easy to install with one button, one-button operation for start/stop function when in use, simple and smart. Product List Bath machine*1 Brush head*3 Back panel*1 Data cable*1 Installation tool*1