1. Easy to Use: This remote control frequency tester accurately measures remote control frequency with a clear display, allowing you to adjust the exact frequency needed for configuration. 2. Accurate Display: The electronic infrared frequency measuring instrument features a digital display with four red digits and a measurement accuracy of 0.01MHz, providing precise frequency readings. 3. Close-Distance Sensing: When the small frequency tester is brought within 10cm of the remote control, it can accurately detect and measure the signal. 4. Wide Applications: Suitable for use with electric door controllers, car door anti-theft alarms, remote controls, electric locks, garage doors, access control systems, and similar devices. 5. Support: For any questions or assistance, please contact the seller through Amazon messaging. Electrical Display Type: Digital Only Model Number: Key Infrared Frequency Tester Colour: Gray-Black Material: ABS Size: 150x75x30 mm / 5.9x2.9x1.1 in Package Contents: 1 x Infrared Frequency Tester Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement error allowance is +/- 1-3 cm.