Karaoke system to sing and enjoy in company. Includes sound functions and is ideal for parties and meetings. Does not function as a charger for rechargeable batteries. Non-rechargeable batteries do not need to be recharged. Batteries must be inserted in the correct polarity. Remove dead batteries from the toy. Batteries must be changed by an adult. Do not dispose of batteries in fire, they may explode or leak. Only batteries of the recommended type or a similar type should be used. The battery terminals must not be short-circuited. Do not mix alkaline, standard (carbon-zinc) or rechargeable (nickel-candium) batteries. Do not mix old and new batteries. If storing the product for long periods of time, be sure to remove the batteries.