Feature: 1. Real-time spectrum analysis function: real-time spectrum scanning, SPAN/RBW/CENT/MARKER function, MAXHLOD function, automatic maximum power detection. 2. Function of frequency chromatogram: it shows the whole time and spectrum characteristics within a period of time, and can record all spectrum distributions within 5 minutes cyclically, so as to facilitate the inspection of frequency interference, emission leakage and other problems. 3. Spectrum thermodynamic diagram function: it shows the overlapping density of spectrum contour in a period of time, and the frequency of repetition tends to be red, which is convenient for analyzing the spectrum statistical characteristics in a period of time. 4. Portable spectrum analyzer, built-in lithium battery, small size and lightweight, using the standard 5V charger can be charged, full charge can last about 9 hours. 5. It's widely uesd in rf testing, wireless optimization, field networking, interference query, etc. Specification: Condition: 100% Brand New Item Type: Spectrum Analyzer Material: ABS+Metal Color: As shown in the picture Weight: Approx.515g/18.2oz Index Parameter range Model XT-239-AT S11 ( typical value) -31dBm Frequency range(MHz) 2.3~2.9GHz In-band unevenness 0.5dB(after calibration) RBW(kHz) 20, 30, 50, 100, 200 and 300kH(minimum) DANL(average bottom noise) -110dBm（typical value） Amplitude precision +-0.5dBm Scanning time 200ms MAXHOLD function Support Reference level adjustable Support Display refresh frequency 5Hz(refresh 5 screens per second) LCD resolution TFT 800×480 LCD size 5in Radio frequency interface SMA-K Chromatogram Support AT function Support Thermodynamic diagram Support Built-in RTC clock Support Battery capacity 3300mAh（typical） Battery type 18650 lithium battery Charging time 4～5 hour Charging interface Micro USB interface Battery life 9 hour Size 135x101x30mm / 5.3x4.0x1.2in(excluding knob and antenna height) Operating temperature -20～45℃ Storage temperature -20～70℃ Signal range -100 ~ -10dBm (large signal and attenuator enter) Package List: 1 x Spectrum Analyzer1 x English Manual1 x Antenna1 x Data Cable1 x Power Plug1 x Antenna Nut1 x USB Serial Port Module Note: 1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.