Digital Remote frequency Reader Counter Checker for IR RF Remote Control This is a frequency counter of remote control, which can test the frequency of remote control and show out on the screen. So it would be easy for you to get the right frequency when you change your remote. Mini Frequency Gauge Digital Frequency Meter RF Frequency Signal Detector Testing Range: 100MHz to 1000MHz Power Source: 3 x AAA Battery (INCLUDED) Testing applicable to the remote control, mobile phone, walkie-talkies and other testing tools