... Free SDK and can provide customized feature development. Language localization .etc. Detail Parameters ItemDescriptionCommunicationTCP/IP 10M/100M ... 13m, suggestion distance is 3m or lessRS485: bus line max length 1200m, suggestion length 1000m or less ... net coverage areaCollocationsPCB board, case, power, power line, serial port communication line, software, manual, certificate, key(2pcs), cartonAlarm ...