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 easily 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 micro-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 easily 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 percent Storage conditions: -20 -50 Relative humidity: Less than 85 percent 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.