Features: For 21700 Battery Pack Box with Switch and Cord, no soldering needed. Suitable for toys, LED lights, monitoring cameras, speakers. Transparent Lid and Convenient Switch: The battery pack box has a transparent lid, making it easy to open the battery holder, saving you time and energy. Equipped with a switch and 140mm cable, you can easily control the power flow, convenient for battery-powered devices. Only supports output, does not support input function, output voltage: 11.10V-12.6V Specifications: Size: about 94x62 mm/3.7x2.44 inches For 3x21700 Series Solder-Free Battery Box Output Voltage: 12V Cable Length: about 140 mm/5.51 inches Note: Due to lighting effects problems, there may be tolerances in the product, please understand. Please allow 0-1cm error due to the measurements Package Includes: 1 Set For 21700 Battery Box