QR codes offer another versatile and cost-effective method for checkpoint verification within the GPS NFC/QR Guard Tour Patrol system. These scannable barcodes can be printed and affixed to various surfaces, providing an easy and quick way for guards to register their presence. When a guard scans a QR code with their mobile device, the system records the time, date, and identity of th... https://guardworkforce.com.sg/products/gps-nfc-qr-guard-tour-patrol-system/