Features: 10in1 design,more useful,Use this product to replace the LR6 AA LR03 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. This eliminates the need for 2x or 3x 1.5V AA AAA batteries,Never change batteries again! This battery replacement allows you to use practically any device that is only powered by 3 AAA or AA batteries. Suitable for Radio,electric toy, Christmas holiday LED lights,luminara candles,Interphone,Walkie talkie,Calculator,power remote controller, keyboard, Christmas advent calendar display, and more 3V or 4.5V power supply devices No Need To Change Battery Frequently: With this AA AAA battery eliminator adapter,you don'for t need to buy a lot of replacement batteries when the batteries run out,saving you more for time and money. Easy to Use: Put the adapter correctly into the battery for case according to the positive and negative poles.Designed for devices that use 2 or 3 AA or AAA batteries. Nice to be able to connect it with other 3V or 4.5V Christmas items and not have to worry about tuning on or off. Specifications: Color: Black Plug Type: US Plug Model: AA,AAA(optional) Material: Plastic Power Cable length: about 440cm 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 US Power Adapter 1x Power Supply Cable 10x Black Dummy Fake Battery 20x Yellow Dummy Fake Battery