This product is an instrument for testing the frequency of wireless remotely control, which can test the frequency of the remotes control and display it clearly; it can also test the goodness of infrared sensing; it allows you to adjust the frequency you need when formulating the remotes control. Features: Premium Material: The housing is made of solid plastics material, fallproof, wear resistant, and with nice durability. Digital Display: 4-bit digital display of radiofrequency -computer measuring instruments, you can see the tested frequence clearly. LED Light Design: The instrument is equipped with LED illumination, which is more convenient for using in the dim light environment. Indicator Light: Equipped with an infrared input indicator, the red light shows that the infrared output of the remotes control is normally emitted; If the indicator is off, means the infrared emitter failure, damage or other reasons. 9V Battery Power Supplys: Built-in a 9V battery, capacity and can provide long service time. Wide Applications: It can be used to test the frequency of the remotely control and display it clearly; it can also test the goodness of infrared sensing; it allows you to adjust the frequency you need when formulating the remotes control. Specifications: Name: Infrared Frequency Tester Color: black Material: plastics Battery: 1 x 9V battery (no included) Test ranges: 100M-1GHZ Working conditions: -10 to 40 Relative humidity: Less than 80% Storage conditions: -20 -50 Relative humidity: Less than 85% Item size: 150 x 75 x 30mm / 5.91 x 2.95 x 1.18in Item weight: 205g / 7.23ounce Package Contents: 1 x Infrared Frequency Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.