Features: *Using stm32f407 microcontroller (main frequency 168M) and 4.3-inch TFTLCD (480*800) color LCD screen. *All aluminum alloy housing and rotary encoder control. *Built-in lithium battery, full English display. *The spectrum display range is 35M-4400MHz. *Scope of use: walkie-talkies, toy remote controls, 2.4Gwifi. Specifications: Material: aluminum alloy + metal Color: Black Screen size: 4.3 inches Battery: 1*Lithium battery, 2000mAh (included) Spectrum display range: 35M-4400MHz Input impedance: 50 ohms RBW: 100KHz, 200KHz, 500KHz, a total of 5 levels adjustable Screen scan points: 700 points Scan span: 7M (10KHz), 35M (50KHz), 70M (100KHz), 140M (200KHz), 350M (500KHz) dBm Range: -80dB~10dB (supports manual adjustment of calibration amplitude). There is no circuit inside this machine. If you need to measure small signals, you need an external . Maximum access signal: 10dB Working mode: superheterodyne scanning spectrum analyzer, single scanning time is 800ms Product size: /5.7*2.8*1.2in Product weight: 200g / 7.1ounce Packing size: 300*140*70mm/11.8*5.5*2.8 inches Packaging weight: 335g/11.8oz Part Name:4.3-inch handheld spectrum analyzer Size:145*70*30mm Package Content: 1x spectrum analyzer 1x glue stick antenna 1x telescopic antenna 1xTYPE-C charging data cable 1x machine corner pad