Features: The AA BatteryEliminators Power Supply Adapter is the perfect solution to replace AA batteries. This product is mainly designed for decorative lights that use AA battery packs. Long term use during holidays, Christmas, decorating home and displayspacescan result in fastbattery consumption and frequent . replacement. Replacing AA batteries with this product saves the hassle of replacement and can save energyProviding a reliable and continuous power source for your remote control, LED lights, electric clock, and Christmas tree lights. Input USB5V, one black battery output is 4.5V, two black batteries output is 3V, and the yellow virtual battery is 0V, only used asconductor. Suitable for Christmas LED lights, various holiday decorative lights, fans, cameras, and various 4.5V 3V AA battery powered product. Specifications: Material :Plastic Cable Length：approx 300CM/9.84ft Battery Length:approx 4.7cm/1.85in Tyeps: 1 to 3/ 1 to 1/ 1 to 5/ 1 to 10 Batteries note: 1.Due to the light and resolutions setting difference, the item's color may be slightly different from the pictures. 2.Please allow slight dimension difference due to different manual measurement. Package includes: 1 Set AA BatteryEliminator