{"product_id":"tef6686-high-sensitivity-radio-fm-am-supports-global-frequencies-built-in-battery-with-infrared-remote-control-high-fidelity","title":"TEF6686 high-sensitivity radio FM\/AM supports global frequencies, built-in battery with infrared remote control, high fidelity","description":"\u003cdiv\u003e\u003cspan style=\"color:rgb(33, 33, 33);font-size:9pt;font-family:ArialMT\"\u003ePE5PVB Project:https:\/\/github.com\/PE5PVB\/TEF6686_ESP32\u003c\/span\u003e\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cspan style=\"color:rgb(0, 0, 0);font-size:24px;font-family:SimSun\"\u003eBasic operations.\u003cbr\u003e\nON\/OFF button: power switch, encoder (ROTARY) mode switching, long press\u003cbr\u003e\nON\/OFF button for 3 seconds to turn on or turn off the power, after the power\u003cbr\u003e\non, short press the encoder once for the volume, continuous short press the\u003cbr\u003e\nencoder for the ambient light to choose\u003cbr\u003e\nFunction, short press once to exit.\u003cbr\u003e\nROTARY (encoder): Power on is to adjust the frequency, short press the on\/off button once is for the\u003cbr\u003e\nvolume level, and enter the setting interface for the shift function. Short press on the center button\u003cbr\u003e\nis step switching, long press is to open iMS and EQ.\u003c\/span\u003e\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cspan style=\"color:rgb(0, 0, 0);font-size:24px;font-family:SimSun\"\u003eBW button: bandwidth selection Short press in FM mode:Stereo\/Mono switching\u003cbr\u003e\nLong press in FM mode: demodulation bandwidth switching, switching between\u003cbr\u003e\n56\/64\/72\/84\/97\/114\/133\/151\/168\/184\/200\/217\/236\/254\/287\/287\/311kHz\/AUTOBW.\u003cbr\u003e\ncan also be selected by pressing and holding the BW button and using the TUNING knob\u003cbr\u003e\nShort press in AM mode: demodulation bandwidth switching, switching between 3\/4\/6\/8kHz\u003c\/span\u003e\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cspan style=\"color:rgb(0, 0, 0);font-size:24px;font-family:SimSun\"\u003eMODE button: tuning mode Short press:MAN(manual FM)\/AUTO(auto search)\/MEM(station\u003cbr\u003e\noperation) mode switchingLong press:Open menu page\u003c\/span\u003e\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cspan style=\"color:rgb(0, 0, 0);font-size:24px;font-family:SimSun\"\u003eAM\/MF button: band selection Short press: band switching, switching between LW\/MW\/SW\/OIRT\/FM\u003cbr\u003e\nIn FM mode long press:to open the Advanced RDS view\/Alternative Frequency view, the\u003c\/span\u003e\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cspan style=\"color:rgb(0, 0, 0);font-size:24px;font-family:SimSun\"\u003eFrequency range.\u003c\/span\u003e\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cspan style=\"color:rgb(0, 0, 0);font-size:24px;font-family:SimSun\"\u003e65-108 MHz for Russia\/Eastern Europe\u003cbr\u003e\n76-95 MHz suitable for Japan\u003cbr\u003e\n76-108 MHz suitable for campus broadcasting\u003cbr\u003e\nFM 87-108MHz for\u003cbr\u003e\nEurope\/Oceania\/Africa\/Asia 87.5-108MHz\u003cbr\u003e\nfor China\/USA\u003cbr\u003e\nOIRT default step 30kHz,FM step\u003cbr\u003e\n50\/100\/200kHz,default 100kHz shortwave 1700-27000kHz\u003cbr\u003e\ndefault step 5kHz\u003cbr\u003e\n522-1791kHz in default steps of 9kHz\u003cbr\u003e\nMid-wave 520-1720kHz default\u003cbr\u003e\nstep 10kHz Long-wave 144-\u003cbr\u003e\n513kHz default step 9kHz\u003cbr\u003e\n\u003cbr\u003e\nReceiving indicator:Tie rod\u003cbr\u003e\nantenna receiving\u003cbr\u003e\nsensitivity selective\u003cbr\u003e\nFM(S\/N=30dB)≤0.5uVFM≥60dB(±150kHz)\u003cbr\u003e\nShortwave\u003cbr\u003e\nSW(S\/N=20dB)≤10uVSW≥60dB(BW=3kHz\/+5kHz)Mediumw\u003cbr\u003e\nave\u003cbr\u003e\nMW(S\/N=20dB)≤10uVMW≥60dB(BW=3kHz\/±9kHz)Longwa\u003cbr\u003e\nve LW(S\/N=20dB)≤10uVLW≥60dB(BW=3kHz\/+9kHz)\u003cbr\u003e\n\u003cbr\u003e\nAntenna interface: full band with external antenna, standard BNC external button hole\u003cbr\u003e\nSpeaker output: the use of digital audio amplifier chip, drive 45x45mm large size wide frequency cavity\u003cbr\u003e\nspeakers, power 4Ω\/5W.\u003cbr\u003e\nOutput noise is lower, distortion is small, volume up does not distort, built-in always speaker,\u003cbr\u003e\ncircuit design is stereo, stereo channel please set to mono (mixing mode)\u003cbr\u003e\nHeadphone output: the use of imported freight chip, easy to connect to the amplifier, standard 3.5mm\u003cbr\u003e\naudio connector output, speakers and headphones independent dual-amplifier design, inserted into the\u003cbr\u003e\nheadphones, built-in amplifier mute switch to headphone output.\u003cbr\u003e\nBattery Parameters:3.7V\/4000mAh,18.5Wh,Li-ion\u003cbr\u003e\nbattery size 80x50x8mmCurrent Consumption:about\u003cbr\u003e\n3.7V\/350mA,using time about 10 hours\u003cbr\u003e\nCommunication interface: built-in CH340 USB to serial chip, through the\u003cbr\u003e\nTYPE-C interface to external communications, support for online upgrades\u003cbr\u003e\nSize and weight: L142 * W30 * H80mm (excluding antenna connector and\u003cbr\u003e\nantenna), body weight 450g\u003cbr\u003e\nInfrared Remote Control.\u003cbr\u003e\nSupports all key functions, numeric 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