Features: Easy to operate.  Can receive most of the campus radio.  Can play MP3 format music stored in the TF card.  Type in the number to search for your favorite radio program or music.  Can be used as PC loudspeaker.  Can be used as USB disk when TF card is inserted.  Excellent sound.  Pocket size, you can enjoy the radio or music at any time.  LED nixie tube display;  Power Supply: Lithium battery (charged via USB jack);  Frequency range:  FM 64-108 MHz / 76-108MHz / 87-108MHz ;  Sensitivity: FM < 3uV  ;  Supported Formats: MP3;  Support TF Card: Max 8GB;  Speaker: Φ40mm, 4Ω, 3W;  Frequency Response: 18Hz-80 KHz;  Power Supply: built-in 1000mA BL-5C rechargeable battery;  Charging Voltage: DC 5V (mini USB interface);  Dimensions: 5.0 x 2.9 x 0.8 in (128 x 74 x 21 mm)  ;  Weight: 5.2 oz (148g);     Package Included:  1 x D3 Radio;  1 x USB Cable;  1 x BL-5C Lithium Battery;  1 x User Manual