... telemetery charging for Parking,parking lot,electronic bus station 3.RS232/RS485/TTL Technical specification of RF Transmitter Modules:JZ873: ... 50 12Power supplyDC 5±0.5V 13Dimension58mm×38mm×10mm 14InterfaceTTL, RS232, RS485user can choose15Reliable transmit distance1-3Km Features:1. Low ... structure and also improve the reliability of our modules. RS232/RS485/TTL Wireless Communication Modem JZ873