??Permanently connect directly to your battery and use of high-power appliances, thereby protecting the car cigarette lighter. the red is positive and the black is negative. ??Manufactured to power 12 volt and 24 volt appliances. ??Weatherproof: a water resistant cap to protect the female socket from the elements.Durable plastic material ensures durability and longevity. ??External 15Amp fuse protection make sure the safety in case of short circuit and prevent damage to devices from high surge current.And will get extra 15 Ann and 25 Ann fuse as a backup. ??16 AWG cable length is 13.1ft / 4m,the size of the hole in the ring terminal: 0.25 inch / 6.3mm.Product Description 16 AWG cable length is 13.1ft / 4m,the size of the hole in the ring terminal: 0.25 inch / 6.3mm.