Estone Digital Frequency Counter Tester For Two Way Radio Transceiver GSM 50 MHz-2.4GHz This frequency counter can continually test the analog radio signal (handhold radio, wireless phone, GSM mobile phone etc ) and digital radio signal, to display the frequency parameter with the signal strength. This is the best tools for the signal testing and radio maintenance Frequency step : 200K (digital radio signal), 1K, 100Hz Testing range : 50 MHz ~ 2.4 GHz Antenna : pulling out antenna