LD485

The LD485A is a high performance multi-function bi-directional RS232<=>RS485 interface converter, widely use in surveillance system, attendance checking system and IC card tolling system.

NC6XX_Convertor
NC6-series converter is a  professional bi-directional  RS232 and TCP/IP interface converter .

GSM_Modem
GSM Modem is a professional device to send SMS from PC.

945GC
945GC is a professional motherboard for DVR surveillance.