Descriptions:The case can hold 2 x AA batteries, and provide 3V power for your device.Made of ABS material, lightweight, convenient to carry.Perfect for Soldering /Connecting. Be used as a perfect external power source.With a switch, easy to control the power supply.Battery is not included here!Specifications:Power Supply: 3VProduct Name: Battery HolderDimension: 68 x 32 x 18mm(L*W*H)Wire Length:160mm/6inchCountry of Manufacture: CHINAMaterial: ABSColor: BlackNet Weight: 38gFit for: 2 x 3V AA Battery (Battery is not included here.)Package Contents:5 x Battery HolderNote: Please do not separate, maintain, or refit the product.The wires are thin, and the structure of this product is only fit for very small current load, DO NOT connect it to a load that will cause large current, stop using this product if the wires are hot.1. When the battery case is working, the maximum power should be less than 5W, the working current should be less than 2A.2.Please pay attention to your battery heat generation while using this product and do not use the poor quality battery.