Features: Come with 12pcs Dummy battery(8pcs AAA+4pcs AA),can powered 2x AAA+1x AA device at the same-time,the output voltage of the 3pcs cable dummy battery is the same,if you want to powered 3x 12V device,you need to buy more dummy battery,our dummy battery only fit for 1x 12V device or 3x 7.5V 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 AA or 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. No Need To Change Battery Frequently: With this 2AAA+AA battery eliminators Adapter,you don't need to buy more replacement batteries when the batteries run out,saving your money. Replace 2 to 8pcs 1.5V LR03 AM4 AAA LR6 AM3 AA battery AC-DC power supply cord,This eliminates the need for 2 to 8pcs 1.5V LR03 AM-4 AAA LR6 AM3 AA batteries,Dummy battery is conductor,no power,can change output voltage display,easy to use. This eliminates the need for 2-8pcs 1.5V AA AAA batteries. Suitable for Radio,electric toy, telephone, Thermometer Hygrometer,Christmas LED lights,Clocks,Calculator,power remote controller, keyboard,Electronic door lock and more AA AAA Battery power supply devices,Suitable for 3V 4.5V 6V 7.5V 9V 12V AA AAA Battery Powered device,if your device only use 1pc 1.5V battery,can not fit this adapter,this dummy battery adapter fit for 2 to 8pcs AA AAA Battery devices. brand new and high quality. 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 Package Includes: 1x 3V-24V adjustable voltage adapter 1x tool 8x AAA dummy battery 4x AA dummy battery 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!