The Wilko Bobble Remover removes bobbling from fabrics. This fabric shaver requires two AA batteries (not included). Only for use on items of clothing, it should not be used when the clothing is being worn. Not for use on fine fabrics such as cashmere, angora or mohair. Do not apply excessive pressure when using the shaver. Do not mix different types of batteries or use rechargeable batteries with the bobble remover.