Features: 1. In The Design Of This 4.3-Inch Tft Color Lcd Screen Spectrometer, 2. The Most Cost-Effective Chip Adf4351 Is Selected As The Reference Signal Source, Which Can Accurately Measure The Frequency Value. 3. Use High-Performance Mixers And Detectors With Micro-Adjustment Software Parameters To Measure Signal Amplitude Values. 4. Use Stm32f4 Series Microcontroller And 4.3-Inch Color Lcd Screen 5. Black Aluminum Alloy Shell, Beautiful And Sturdy Description: Screen Size: 4.3 Inches Battery: 1 * Lithium Battery, About 2500mah Battery Life: 4-6 Hours machine Weight: 255g Including Battery. Using STM32F407VET6 Microcontroller + 4.3-Inch Tftlcd 480 *800 Color Lcd Display. Full Aluminum Alloy Shell + Rotary Encoder Control + Full English Display Interface + Usb Power Supply. Scope Of Use: Walkie-Talkies, Toy Remote Controls, 2.4gwifi Performance: 1. Spectrum Display Range: 35mhz-4400mhz; Input Impedance: 50 Ohms. 2.Rbw: 10khz, 50khz, 100khz, 200khz, 500khz Adjustable. 3. Screen Scanning Points: 700. 4. Scan Span: 7m 10Khz., 35m 50Khz., 70m 100Khz., 140m 200Khz., 350m 500Khz.. 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. (Different batches may have differences in product appearance, color, and printing, which do not affect use) size: 145 x 30 x 70mm Material: Aluminum alloy + metal colour: black Package Contents: 1 x Spectrum Analyzer 1 x Glue Stick Antenna 1 x Lever Antenna 1 x Type-C Charging Data Cable 1 x Machine Corner Pad Only the above package content, other products are not included. 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.