Features: USB 5V2A to 1.5V 3V 4.5V 5W 3A LR03 fake battery power supply line, adjustable output voltage. Cost saving and environmentally friendly, without need to frequently replace batteries, can power by charger, power adapter. USB input 5V2A, output 1.5V 3V 4.5V adjustable 5W, can replace 1-3pcs 1.5V 3A LR03 batteries. Suitable for various LR03 battery powered electronic devices such as toy, hygrometer, fan, remote controls, thermometers, tools, instrument and more. The green is fake battery, and 0V is used as conductors. Before use, the voltage must be adjusted. If the device use one battery voltage to adjust to 1.5V, two batteries to adjust to 3V and install a green fake battery, three batteries to adjust to 4.5V and install two green fake batteries. Specifications: Material: Plastic Cable length: approx. 118cm/3.8ft Battery length: about 4.3cm/1.69inch Input: USB 5V2A Output: 1.5V 3V 4.5V Adjustable 5W Package Includes: 1 Set USB 5V to 1.5V 3V 4.5V 3A Dummy Battery Power Cord note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.