Features: 1. In The Design Of This 4.3-Inch Tft Color Lcd Screen Spectrometer,_x000D_ 2. The Most Cost-Effective Chip Adf4351 Is Selected As The Reference Signal Source, Which Can Accurately Measure The Frequency Value._x000D_ 3. Use High-Performance Mixers And Detectors With Micro-Adjustment Software Parameters To Measure Signal Amplitude Values._x000D_ 4. Use Stm32f4 Series Microcontroller And 4.3-Inch Color Lcd Screen_x000D_ 5. Black Aluminum Alloy Shell, Beautiful And Sturdy_x000D_ _x000D_ Description:_x000D_ Screen Size: 4.3 Inches_x000D_ Battery: 1 * Lithium Battery, About 2500mah_x000D_ Battery Life: 4-6 Hours_x000D_ machine Weight: 255g Including Battery._x000D_ Using STM32F407VET6 Microcontroller + 4.3-Inch Tftlcd 480 *800 Color Lcd Display._x000D_ Full Aluminum Alloy Shell + Rotary Encoder Control + Full English Display Interface + Usb Power Supply._x000D_ Scope Of Use: Walkie-Talkies, Toy Remote Controls, 2.4gwifi_x000D_ Performance:_x000D_ 1. Spectrum Display Range: 35mhz-4400mhz; Input Impedance: 50 Ohms._x000D_ 2.Rbw: 10khz, 50khz, 100khz, 200khz, 500khz Adjustable._x000D_ 3. Screen Scanning Points: 700._x000D_ 4. Scan Span: 7m 10Khz., 35m 50Khz., 70m 100Khz., 140m 200Khz., 350m 500Khz.._x000D_ 5.Dbm Range: 70Db To +10Db. There Is No Amplification Circuit Inside. If This Machine Needs To Measure Small Signals, An External Amplifier Is Required._x000D_ (Different batches may have differences in product appearance, color, and printing, which do not affect use)_x000D_ size: 145 x 30 x 70mm_x000D_ Material: Aluminum alloy + metal_x000D_ colour: black_x000D_ _x000D_ Package Contents:_x000D_ 1 x Spectrum Analyzer_x000D_ 1 x Glue Stick Antenna_x000D_ 1 x Lever Antenna_x000D_ 1 x Type-C Charging Data Cable_x000D_ 1 x Machine Corner Pad_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_