Basic operation: ON/OFF button: main power switch, encoder (ROTARY) mode switch, long the ON/OFF button for 3 seconds to turn on or off, after turning on, short the encoder once for volume, short the encoder twice in a row for atmosphere light selection function, short once to exit. ROTARY (encoder): Turn on to adjust the frequency, short the switch key once for volume, and enter the setting interface for shift function. Short the middle button for step switching, long to turn on and EQ. button: bandwidth selection. Short in FM mode: stereo/mono switching Long in FM mode: demodulation bandwidth switching, switching between 6/64/72/84/97/114/133/151/168/184/200/217/236/254/287/287/311kHz/AUTOBW, or and hold the button and use the TUNING knob to select. Short in AM mode: demodulation bandwidth switching, switching between 3/4/6/8kHz. MODE button: tuning mode Short : MAN (manual frequency tuning)/AUTO (automatic search)/ (memory operation) mode switching. Long : open the menu page. AM/MF button: band selection. Short : band switching, switching between LW/MW/SW/OIRT/FM. Long in FM mode: open advanced RDS view/Alternative Frequency view Headphone output: freight chip is used, which is convenient for connecting to the power amplifier, standard 3.5mm audio connector. output, dual op amp design for speakers and headphones, plug in headphones, and the built-in power amplifier is and switched to headphone output. Communication interface: built-in CH340 USB to serial port chip, external communication through TYPE-C interface, support online upgrade Frequency range: 65-108MHz Suitable for Russia/Eastern Europe 76-95MHz Suitable for Japan 76-108MHz Suitable for campus broadcasting FM 87-108MHz Suitable for Europe/Oceania/Africa/Asia 87.5-108MHz Suitable for China/USA OIRT default step 30kHz, FM step 50/100/200kHz, default 100kHz Shortwave 1700-27000kHz default step 5kHz 522-1791kHz default step 9kHz Medium wave 520-1720kHz default step 10kHz Long wave 144-513kHz default step 9kHz Reception indicators: Telescopic antenna receiving sensitivity Selectivity FM (S=30dB) 0.5uV FM 60dB(150kHz) Shortwave SW (S=20dB) 10uV SW 60dB(=3kHz/+5kHz) Medium wave MW(S=20dB) 10uV MW 60dB(=3kHz/9kHz) Long wave LW(S=20dB) 10uV LW 60dB(=3kHz/+9kHz) Antenna interface: External antenna for all frequency bands, standard BNC outer buckle inner hole Speaker output: Digital audio power amplifier chip is used to drive 45x45mm large-size broadband sound cavity speaker, power 4/5W, Lower output noise, low distortion, no distortion when the volume is turned up, built-in speaker, circuit design is stereo, please set the stereo channel to mono (mixing mode) Color: As Shown Material: ABS+Metal Package Contents: 1 x Radio 1 x Remote control (without 2 x AA batteries) 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.