Replace 2 to 8pcs 1.5V LR03 AM4 AAA battery AC-DC power supply cord,This eliminates the need for 2 to 8pcs 1.5V LR03 AM-4 AAA batteries,Dummy battery is conductor,no power,can change output voltage display,easy to use. No Need To Change Battery Frequently: With this AAA battery eliminators Adapter,you don't need to buy more replacement batteries when the batteries run out,saving your money. Come with 12pcs Dummy battery,can powered 3x 3V or 4.5V or 6V AAA device at the same-time,the output voltage of the 3pcs cable dummy battery is the same,if you want to powered 3x 12V AAA device,you need to buy more dummy battery,our dummy battery only fit for 1x 12V AAA device. This eliminates the need for 2-8 pcs 1.5V AAA batteries. Suitable for Radio,electric toy, holiday LED lights,Clocks,Calculator,power remote controller, keyboard,Electronic door lock and more AAA Battery power supply devices,Suitable for 3V 4.5V 6V 7.5V 9V 12V AAA Battery Powered device. Easy to Use: Put the adapter correctly into the battery for slot according to the positive and negative poles.Designed for devices that use 2 to 8 AAA batteries,Nice to be able to connect it with other 3V to 12V Christmas items and not have to worry about tuning on or off. Specifications: Input Voltage: AC100-240V 50/60Hz Plug Type: US Plug,EU Plug,UK Plug(optional) Output Voltage: DC3V to 12V 1.2A(can adjustable voltage) Cable Length: Approx. 220cm/86.61inch Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1x 3V-24V adjustable voltage adapter 1x tool 12x dummy battery