Features: FM+AM+SW (18 short wave bands). A total of 21 band radios.  Advanced DSP digital tuning display.  TF card / U disk music playback.  Digital key selection program.  Power switch: Press the power button to turn the machine on and off.  MP3: Tap to play the program in the TF card/U disk, tap play/pause again.  SW: Open the antenna, tap to play 1-18 shortwave broadcasts, and the up and down buttons are SW1-18 shortwave selection buttons. FM / AM: Click to play FM1 (87.0-108.0MHZ), press FM button in FM mode to select FM2 schoolyard radio (70-87MHZ), and tap play AM medium wave broadcast (522-1620KHZ) again.  Previous song: In MP3 mode, tap to play the previous track of TF card/U disk, long press, and rewind, in SW1-18 short wave mode, tap to select the last short wave band.  Next song: In MP3 mode, tap to play the next track of TF card/U disk, long-press fast forward, in SW1-18 short wave mode, tap to select the next short wave band.  Volume knob: Increase (V.+) or decrease (V.-) volume.  Number keys 0-9: Enter the number in MP3 mode to select the track you want to listen to (for example, enter 28 to select the 28th song) TUNING wheel: In the radio mode, rotate the tuning button to listen to FM, mediumwave and short wave broadcast.  USB: Insert a USB flash drive to play music;  TF card: insert a TF card to play music;  DC 5V: Connect the data cable to charge;     Specification: Color:Red / Black;  Power Output:3W;  THD:≤5%;  Speaker:57mm 3Ω;  Freq.Response: 240Hz-15KHz;  FM Frequency: 70MHz-108MHz;  Input Power: DC 5V;  Material:Plastic;  Battery:18650  3.7V/500mAH;     Package Included: 1 x Portable Radio;  1 x 18650 Battery;  1 x USB Charging Cable