Usage Tips: Features: brand new and high quality. Use this product to replace the AA AAA battery, which is pre-configured with black current-limiting power packs, and yellow is straight through. 1x Black Dummy Fake battery output is 4.5V Replace 3x AA or AAA battery,2x Black Dummy Fake battery Replace 2x AA or AAA battery,Yellow Dummy Fake Battery is Link function. Replace 2x or 3x AA AAA battery power supply cord. This eliminates the need for 2x or 3x 1.5V AA AAA batteries. Suitable for Radio,electric toy, holiday LED lights,C-D player,Clocks,luminara candles,Calculator,power remote controller, keyboard, Christmas advent calendar display,Walkman and more 3V or 4.5V power supply devices Nice to be able to connect it with other 3V Christmas items and not have to worry about tuning on or off. Specifications: Color: Black Plug Type: EU Plug Material: Plastic Power Cable length: 300cm input: AC 100-240V-50/60Hz Max output: for DC 4.5V 800mA(max) 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 EU Plug Power Supply Adapter 1x AA Power Supply Cable 1x AAA Power Supply Cable 1x Black AA Dummy Fake Battery 2x Yellow AA Dummy Fake Battery 1x Black AAA Dummy Fake Battery 2x Yellow AAA Dummy Fake Battery