Features: Brand new and high quality. It is recommended to attenuate the signal below 0dBm before inputting it into the machine for measurement. For example, a 5W (37dBm) walkie-talkie needs to be connected to a 40dB attenuator before connecting to the machine for measurement. With the signal generator function, you can easily test the sensitivity of your walkie-talkie. Used for debugging NFC, LoRa, GPS, 3/4/5G mobile communication (below 6GHz), WIFI equipment, finding equipment, locating signals, etc. More functions to discover; refer to the forum discussion with 2000+ people: groups.io/g/tinysa/topics. It is not SDR, but it has FM and AM demodulation functions (general performance) and can listen to the radio via the built-in headphone jack. Specifications: Material: Metal Size: 4 inches Rated Frequency: 100K-5.3GHz Note: No retail package. Please allow 0-1cm error due to manual measurement. Ensure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Set x Spectrum Analyzer