Features: Frequency Test Ranges:300Mhz-320Mhz 434Mhz 868Mhz This is a remote Controls frequency tester, which can accurately test the remote Controls frequency with clear display. This allows you to easily adjust the exact frequency required to configures the remote Controls. Intelligently power saving features allow for long batterylife, reducing the need for constant recharging. Way to Test Frequency: 1. Powering on the device 2. Put the remote Controls close to the device 3. Press any button on the remote controls 4. The lits indicator shows the frequency Specifications: Material:ABS Package Includes: 1Set Remote Key Frequency Tester note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.