1. Adopt stm32f407 single chip computer (main frequency 168m) + 4.3-inch TFTLCD (480 * 800) color LCD screen. 2. All aluminum alloy shell + encoder control + all English displayinterface + USB power supply. 3. USB power supply and lithium battery power supply are supported. Product name: hand- portable spectrum analyzer Screen size: 4.3 inch TFT LCD Spectrum display range: 35m-4400mhz; input impedance: 50 ohm. : 10kHz, 50KHz, 100kHz, 200kHz and 500KHz are adjustable. Number of screen scanning points: 700. Scanning span: 7m (10kHz), 35m (50KHz), 70m (100kHz), 140m (200kHz), 350m (500KHz). DBM range: - 80dB ----- 10dB (support manual adjustment of calibration amplitude). There is no amplification circuit inside the machine. If small signal needs to be measured, external amplifier is required. Maximum access signal: 10dB. Working mode: superheterodyne scanning spectrometer, single scanning time 800ms. Size: 122 x 74 x 28MM color:Black Material:ABS+Metal Package Contents: 1 x Handheld spectrum analyzer 2 x antenna 1 x Adapter 1 x USB cable 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.