100MHZ TO 1GHZ FREQUENCY RANGEThe effective testing range of this infrared digital frequency counter is within 5cm, the closer it is to the testing zone, the more accurate the measurement. This allows you to easily adjust the exact frequency required to configure the remote control. The frequency of the car key is generally divided into 320M HZ; 434M HZ; 868M HZ. ACCURATE AND RELIABLEThis key fob frequency scanner allows for accurate and reliable frequency testing and infrared signal detection of remote control devices. It helps users identify any issues or faults with remote controls. In addition, it is equipped with LED lights on the front, making it easier to use in low light conditions, ensuring visibility and accuracy during testing. EASY TO USEJust place the remote control near the IR smart remote control detector in the testing zone, press the power button on the remote control, and the tester will display the frequency value, accurately measuring the frequency. By pressing any button on the remote control, the indicator light will flash red, indicating that the infrared output is functioning properly. WIDE RANGE OF APPLICATIONThis auto key frequency tester adopts compact design makes it easy to carry, facilitating testing on the go. This device can be used on most models of keys, electric door controller, car door anti theft alarms and other remote controls, electric locks, garage doors, remote controls, access control and domestic appliances, etc.