Hi, I am interested in this device. How do I connect it to POS device? Does it have OS? Product Name:Dynamic Barcode Scanner DisplayInterface:Wifi, GPRS, USB, RJ11 interfacesQR Code:Dynamic Barcode Scanner, Dynamic QR Code DisplayCard Reader:ISO14443 NFCDisplay:2.8 inch Color DisplaySIM Card slot:1Optical Resolution:640*488DPILED Lights:6 piecesOption:KeypadOEM Service:AcceptAfter-sales Service Provided:Video technical supportAfter-sales Service Provided:Free spare partsAfter-sales Service Provided:Field installation, commissioning and trainingAfter-sales Service Provided:Field maintenance and repair serviceAfter-sales Service Provided:No after-sales serviceAfter-sales Service Provided:Online supportWarranty:1 YearTouch Screen Type:Not Touch ScreenOperation System:Simple Linux OSCPU:32 bit Security CPU AC35+MH1902Hard Disk Capacity:518MB Memory Show More