Never get the Wireless Guitar wet. Never stand on the Wireless Guitar. Use a dry cloth to clean the Wireless Guitar, never use chemicals to clean the product. Do not mix old and new batteries. Always make sure the batteries are inserted correctly.(+ / -) Remove batteries from guitar when it is stored or not used for long periods of time. 2 Precautions Some medical studies have suggested that long periods of repetitive motion, coupled with poor habits may be linked to certain types of physical di