Features: brand new and high quality Replace 1 to 8pcs 1.5V LR03 AM4 AAA battery USB power supply cord,This eliminates the need for 1 to 8pcs 1.5V AM4 LR03 AAA batteries,Dummy battery is conductor,no power,with output voltage display,easy to use. No Need To Change Battery Frequently: With this AAA battery eliminator USB cable,you don't need to buy more replacement batteries when the batteries run out,saving your money. Press the button to change voltage,with ON/OFF Switch and Voltmeter,come with 7pcs AAA Dummy battery. This eliminates the need for 1-8 pcs 1.5V AAA batteries. Suitable for Radio,electric toy,Thermometer Hygrometer, holiday LED lights,Clocks,Calculator,power remote controller, keyboard,Electronic door lock and more AAA Battery power supply devices,Suitable for 1.5V 3V 4.5V 6V 7.5V 9V 12V and more 1.5V-12V AAA Battery Powered device. Power supply from USB charger,powerbanks,car charger and more USB adapter,input USB 5V2A,output DC1.5V to 12V adjustable. Specifications: Input Voltage: USB 5V 2A Output Voltage: DC1.5V to 12V(can adjustable voltage),6W Cable Length: Approx. 120cm/47.2inch Package Includes: 1 X USB adjustable voltage Cable with display 7 X 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!