F420 is a high-performance UHF RFID four-channel fixed reader/writer of Speedingiot. Based on IMPINJ's new generation E710 UHF RF reader/writer chip design, it has high sensitivity, wide reading range, low power consumption and strong performance. It fully supports electronic tags conforming to EPC Global C1 Gen2/ISO 18000-6C standard. Excellent multi-tag reading performance, peak tag inquiry speed of up to 900 sheets/second, support intensive reading, large-capacity tag reading and writing, received signal strength detection (RSSI). Reliable network adaptability, support for a variety of communication protocols and Web Service development, large-scale application deployment simple appearance patent design, rugged. It can be widely used in logistics, access control, clothing, retail, warehousing, anti-counterfeiting and intelligent manufacturing and other radio frequency identification systems.