Rechargeable built-in battery: This indicates that this cutter head has a built-in rechargeable battery for easy charging and wireless use.
Stainless steel material: This means that the cutter head is made of stainless steel, which has good corrosion resistance and durability.
Noise less than 36dB: The product's working noise is kept at a relatively quiet level during use and will not interfere with the surrounding environment.
Brushes: Products may be equipped with brushes for specific cleaning or conditioning functions.