This product is an instrument for testing the frequency of wireless remote controls, capable of detecting and clearly displaying the frequency of remote controls. It can also test the performance of infrared sensing and allows you to adjust the desired frequency when configuring remote controls.Features: Premium Material: The housing is made of solid plastic material, designed to be durable, wear-resistant, and impact-resistant. Digital Display: 4-bit digital display for radio frequency measurement, enabling clear reading of tested frequencies. LED Light Design: Equipped with LED illumination for improved visibility in low-light environments. Indicator Light: Features an infrared input indicator; a red light indicates that the remote control's infrared signal is being properly emitted. If the indicator does not light up, it may indicate a problem with the infrared emitter. 9V Battery Power Supply: Operates on a 9V battery (battery not included), providing reliable power for extended use. Wide Applications: Suitable for testing remote control frequencies, evaluating infrared sensor performance, and adjusting frequencies during remote configuration.Specifications: Name: Infrared Frequency Tester Color: Black Material: Plastic Battery: 1 x 9V battery (not included) Test Range: 100 MHz - 1 GHz Operating Temperature: -10C to 40C Relative Humidity: Less than 80% Storage Temperature: -20C to 50C Relative Humidity: Less than 85% Item Size: 150 x 75 x 30mm / 5.91 x 2.95 x 1.18in Item Weight: 205g / 7.23oz Package Contents: 1 x Infrared Frequency Tester Note: Other items not included. Note: Lighting and display differences may cause slight variations between the product color in images and the actual item. Measurement error is +/- 1-3cm.