QR Code Access Control Converter: SMD6900D Working frequency: 134.2KHz, 125KHz Support agreement: ISO 11784 / ISO11785 Reading distance: > 20cm Work: Kuj tseem tuaj yeem muab cov kev pabcuam customized kom tau raws li koj cov tswv yim tshwj xeeb thiab xav tau (full duplex communication) Reader chip: soft decoding Working power consumption: 1W Reading rate: 2~3meter/s Wiring way: 2.54 Insert-directly mode Working voltage: 5V Communication Interface: UART Baud rate: 9600 bps Size: 43.43×34.65×2mm Operating temperature: -20℃~+70℃ Humidity: 5%~95%