Shenzhen Antecheng Technology Co., Ltd. is a leading factory in China, specialized in RS232.RS485. PCI, USB, PCMCIA & Express GSM/GPRS/CDMA industrial modems, PCI&RJ45 USB GSM/GPRS/CDMA 8/16/32/64 port modem pools, wireless communication parts and Wireless terminal products RTU DTU . Our devices are in compliance with RS-232 and USB interface standards and have direct connectivity with RTU PLC. Intelligent instruments and other types of industrial devices are connected to next-bit machines, using a transparent means of communication, so non-IP system equipment through the serial ports is easy to access CDMA /GPRS network and internet. We can supply updated OEM and ODM products to our customers. Our principle is "Be responsible for the trust of customers!" Best professional wireless modem manufacturer! Best service for you!