Thank you for choosing our product. Please read through the instruction manual before use so that you can enjoy correct and safe use of this product. Please keep the manual well for future reference use. 0 ol CAUTIONS Improper use of batteries may lead to heat, break or leak. Please abide by the following requirements: @ Do not mix the use of new and old batteries. @ Do not mix the use of batteries of different brands. @ Note polarity when installing batteries.