Fangrui Product Details 1. Cnbj-501 100m-1ghz Infrared Frequency Tester 2. Instructions 3. This Product Is A Test Wireless Remote Control Frequency Instrument, It Can Test The Frequency Of The Remote Control, Can Be Clearly Displayed;and Can Test The Infrared Induction Is Good Or Bad, Lt Is Convenient For You To Adjust The Frequency You Need When Preparing The Remote Control. 4. "onoff" Is The Power Key For External Frequency Line Test. The Remote Control That Needs Tobe Tested Will Be Emited Close To This Frequency Meter(placed In The Test Area), Press The Remotecontrol To Open, You Can Test The Frequency Of The Remote Control, Clearly Displayed Frequencyvalue. (the Effective Test Range Is No More Than 5cm. The Closer The Test Area Is, The Moreaccurate The Measured Value Will Be;car Key Frequency Is Generally Divided Into 320m Hz.434m Hz;868m Hz;) 5. "lighting" Is The Key To Turn On The Front Lighting; The Front Of The Instrument Is Equipped Withled Lighting, Which Is More Convenient In Bad Light Place In Use; 6. "input" Is An Infrared Input Indicator. Will Need To Test The Remote Control With Infrared Light Byclicking On It The Red Light Shows That The Infrared Output Of The Remote Control Is Normally Emitted.lf The Indicator Is Off. The Remote Control Infrared Emitter Failure, Damage And Other Reasons; 7. "ir" Is Infrared Receiving Lamp; 8. Matters Need Attention 9. When Testing, Some Electronic Signal Interference Sources Should Be Avoidedsuch As: Signal Towers, Base Stations, Telephone Poles, Sending And Receivingtext Messages, Etc. 10. Specifications 11. Model: Cnbj--501 12. Test Range: 100m--1g Hz 13. Size: 150x75x30 (main Part) 14. Weight: 205 Grams 15. Working Conditions: -10c -40 Degree C 16. Relative Humiditys: 17. Storage Conditions: -20 Degree C -50 Degree C 18. Relative Humiditys: