Features: The most cost-effective chip adf4351 is selected as the reference signal source, which can accurately measure the frequency value. Performances detector are used to measure the signal amplitudes value with micro-adjustment software parameters. stm32f4 series single chip microcomputer and 4.3-inch color LCD screen are used. Black aluminum alloy housing is robust. Designed for a wide ranges of users, including walkie talkie enthusiasts and toy remote control enthusiasts. Unlock the potential of your devices with our Spectrum Analyzer. From analyzing walkie talkie to optimizing toy remote control, our Spectrum Analyzer is your versatile tool. Explore frequencies and measure amplitudes effortlessly. Take control of your wireless world with our 4.3inch LCD Screen Spectrum Analyzer. Explore frequencies, measure amplitudes, and unlock new possibilities in radio technology. Specifications: Material: Aluminum Alloy, Metal Screen Size: 4.3inches Battery: 1x 2500mAh Battery(Built-in) STM32F407VET6 MCU + 4.3inch TFTLCD (480x800) Color LCD display Aluminum alloy cover + encoders control + English display + USB power supply. Application ranges: walkie-talkie, toy remote control, 2.4Gwifi Performances indicators Spectrum display ranges: 35Mhz-4400Mhz Input impedance: 50ohms RBW: 10kHz, 50KHz, 100kHz, 200kHz, 500KHz adjustable Screen scan points: 700 Span: 7m(10kHz), 35m(50KHz), 70m(100kHz), 140m(200kHz), 350m(500KHz). DBMrange: 70dB to +10dB. There is no internal amplifier circuit, and this machine needs an external amplifier if it needs to measure small signals. Size: Approx. 14.5x3x7cm/5.71x1.18x2.76in Package Includes: 1 Set Frequency Analyser note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.