The CELLMODEM is an accessory of the REM-LINK YIELD TOOL. It provides a wireless interface from a REM – LINK YIELD TOOL to any serial device . Support is provided for computers, large displays, printers PLCs and virtually any serial connected device . It is a wireless module used for wireless data transmission with a small size , weight and power consumption . Single chip radio frequency integrated circuit and single chip MCU are used for lessening peripheral circuits, high reliability and low failure rate. .