This is an operating manual that describes the use and precautions of the CQ-5100U Heavy Duty CD player/Weather Band Receiver. The product is designed for a negative grounded 12V DC battery system and should not be used with other battery systems. Caution should be taken to avoid direct sunlight, excessive heat, water, moisture, and dust exposure. Inserting foreign objects, disassembling, or modifying the product is prohibited.