OPP IOT Technologies Co., Ltd. is based in China and lists products such as UHF Min Metal Tag and RFID Card on Global Trade Plaza. The company lists its year of establishment as 2003. The UHF Min Metal Tag is a miniaturized PCB-based tag with specific dimensions, chip positioning, read distances, and materials including PCB (FR4/glass epoxy) and gold/copper antenna, designed for warehousing, asset tracking, and industrial applications. The RFID Card is a low-frequency (125 kHz) card made from materials such as PVC, PET, PC, or PET-G, with standard CR80 dimensions and thickness, used in access control, attendance management, and supply chain applications.