GY560 Frequency meter Counter tester for Two-Way Radio Transceiver GSM 50MHz-2.4GHz 7 DIGIT LCD Display with Signal Meter Package list: GY560 Frequency Counter*1 English manual*1 This frequency counter can continually test the analog radio signal (handhold radio,wirele phone, etc ) and digital radio signal, to display the frequency parameter with the signal strength.It must be the best tool for the signal testing and radio maintenance. Specifications : - Frequency step : 200K (digital radio signal), 1K, 100Hz. - Testing distance : UHF : 8m, VHF : 5m. - Testing range : 50 MHz ~ 2.4 GHz - Antenna : pulling out antenna - Battery : 9V 6F22(battery not included) - Auto power off time : 1 mins. (except for the digital signal gear) - Operation : the only one button with all functions Operation: The only one button with all functions. The 1st preing to turn on Welcomingrelease the button return to powering off mode ***continually preing To choose the 200k steprelease button , 200k mode for digital radio ***continually preing To choose the 1k step -- release button , 1k mode for faster testing ***continually preing To choose the 100Hz step release button, 100Hz mode for accurate testing ***continually preing Turned on (1k or 100Hz mode) turned on (200k mode)| Pre quickly and release normal preing To lock the screen display Bye Bye Pre quickly again and release release the button, then power off. Unlock the screen continually preing for 2 sec or more Display BI BI Release the button, then power off.