Features: No Need To Change Battery Frequently: With this AA battery eliminator cable,you don'for t need to buy a lot of replacement batteries when the batteries run out,saving you more for time and money. The adapter is made of anti-oxidation nickel plated socket and pure copper wire, with the function of short circuit for protection, overcharge for protection and overcurrent for protection. Dummy battery is conductor,no power,with ON OFF switch,easy to use. Power supply from USB charger,powerbank,car charger and more USB adapter. The USB cable is used for replacing 2pieces AA batteries, so it can be used for most devices that require 2 AA batteries, such as LED lights, decorations, battery operated table lamp. Specifications: Material:Plastic Length:Approx.100cm/39.37in,200cm/78.74in(optional) Input: USB 5V Output: 3V Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x USB Power Supply Cable 1x AA Dummy Battery