Features: Quickly detect and analyze wireless signals with this professional handheld spectrum scanner. The large LCD screen and wide frequency coverage from 35MHz to 4400MHz ensure accurate signal detection and analysis. Designed for radio enthusiasts and communication professionals who require precise signal measurement and analysis. Suitable for various environments such as hotels, offices, and publicspace to monitor and troubleshoot wireless communication. Improve your understanding of the wireless landscape and optimize your networsk performances with this reliable and user friendly spectrum scanner. Specifications: Material:Metal+Plastic Size:Approx.145x70x30mm/5.7x2.75x1.18inch Color:Black 35MHz-4400MHz Input impedance: 50ohms RBW:10khz, 50khz, 100khz, 200khz and 500khz, a total of five gears can be adjusted. Screen scannings point: 700points. Scannings span: 7M(10Khz), 35M(50khz), 70M(100Khz), 140M(200Khz) and 350M(500Khz). DBm ranges: -80dB-10dB (manual adjustment of calibration ranges is supported). There is no amplifier circuit inside this machine. If small signals need to be measured, an external amplifier is needed. Maximumaccess signal: 10dB Scope of use: walkie , toy remote control, 2.4Gwifi Package Includes: 1 Set Spectrum Analyzer note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.