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. 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, large 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 Material: plastics Battery: 1 * 9V built-in battery (included) Test ranges: 100M-1GHZ Working conditions: -10 to 40 Relative humidity: < 80% Storage conditions: -20 -50 Relative humidity: < 85% Item size: 150 * 75 * 30mm / 5.91 * 2.95 * 1.18in Item weight: 205g / 7.23ounce Package size: 160 * 100 * 50mm / 6.30 * 3.94 * 1.97in Package weight: 215g / 7.58ounce Packing List: 1 * Infrared Frequency Tester 1 * Manual