Frequency tester - TOOGOO(R) Handheld Frequency Signal Counter Tester for Two Way Radio Transceiver GSM 50 MHz-2.4 GHz Can continually test carrier signal frequency(radio or cordless telephone); Can continually test digital signal frequency ( GSM,CDMA, or wireless remote control). Can be applied in digital radio signal, to display the frequency parameter with the signal strength. Only one button for setting, very easy and convient to use. With collapsible whip antenna. 7 DIGIT LCD Display with signal meter. This frequency counter can continually test the analog radio signal (handhold radio,wireless phone, etc) and digital radio signal, to display the frequency parameter with the signal strength bar. This is the best tools for the signal testing and radio maintenance.