Description: Mini e to USB adapter card, which adds a lock for the fixed module, which is convenient for users to install and improve the reliability and stability of the module. PCB has 4 screw holes for industrial control small chassis Increase the distance between the SIM holder and the rear panel components Add USB 4-wire input hole disk to directly solder USB cable Working principle: Mini e 52Pin interface defines USB signal and 3.3V voltage. The adapter card converts USB interface 5V voltage into 3.3V through LDO chip, supplies module and SIM work, and signal bus USB signal. Mini meets industry specifications for 1.30 The adapter card is suitable for full-height (30*50-51mm) 4G/3G modules (USB bus) Working LED time display Scope of application: Suitable for most 3G/4G modules, it can also be used for Internet access and module brushing, debugging, testing and unlocking via USB port. Specification: Mini E to USB with SIM slot WWAN test transfer card 3G or 4G module development board back when using this product 1 need to have your own 3G or 4G module 2: After you install the 3G or 4G module, you need to install your 3G or 4G module driver the computer Package Includes: 1x Mini e WWAN Card to USB Adapter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia