"Car Remote Keys Infrared Frequency Tester, 100M-1GHZ 4-bit, Electronic Infrared Frequency Measuring Tester Features: Wide Application: It can be used to test the frequency of the remote control and display it clearly. It can also test the quality of the infrared induction. It allows you to easily adjust the frequency you want when formulating the remote control. High-quality Material: The case is made of strong plastic material, which is drop-proof, wear-resistant and durable. 9V Battery Power Supply: Built-in 9V battery with large capacity and long service life. Digital Display: 4-digit display of the RF microcomputer measuring instrument, the measured frequency is clear at a glance. LED Light Design: The instrument is equipped with LED lighting, which is more convenient to use in dimly lit environments. Indicator Light: Equipped with an infrared input indicator, the red light indicates that the infrared output of the remote control is transmitting normally; if the indicator light is not on, it indicates What You Get: 1*Car Remote Control Frequency Detector, 1*9V Battery, 1*User Manual. Specifications: Item name: Car Remote Control Frequency Detector Model: CNBJ-501 Color: Gray-black Test ranges: 100M-1GHZ Working conditions: -10℃ to 40℃ Relative humidity: ≤ 80% Storage conditions: -20℃ to 50℃ Relative humidity: ≤85% Item size: 149.6*76.2*29.3mm /5.88*3.00*1.15in Item weight: 205g/7.23ouce