Retro Bluetooth Speaker FM Radio Stylish Appearance Ultra Long Standby Stereo Field And Expandable Memory Card Features: Stereo EffectThe full frequency speaker and bass diaphragm create a clean and sweet sound, with clear and balanced midrange and powerful bass. The speaker emits sound and spreads it around, achieving a three-dimensional sound effect. Bluetooth 4.0Bluetooth 4.0 connection, fast transmission, low power consumption, barrier free effective transmission within 10 meters, wide and stable signal range. FM radioAfter short pressing the "M" button to swithes to FM mode, long pressing the "O" button will automatically search for channels. After the search is completed, the changes and volume adjustments will be the same as other modes. Multiple playback modesWhen you don't want to connect to Bluetooth, you can insert a T-Flash card to play music, or use an AUX cable to connect to a computer or other device to play music. Long usage timeUsing a 1800mAh lithiumion battery, when fully charged, it can listen to about 10 hours of music, about 150 songs, and has a long usage time, meeting the needs of listening to music. Product Description: Product Name: Bluetooth Audio System Product color: khaki Impedance:4 ohms Rated power: 8W Frequency response range: 75Hz-20KHz FM radio:76-108MHz Bluetooth version:4.0 Frequency:2.4GHz-2.480GHz Receiving distance:>10m Charging standard: 5V-1000mAh Product size:10.310.310cm/4.14.13.9in Product weight:750g/1.65lb Package size:121212cm/4.74.74.7in Package weight:800g/1.76lb Product List: 1 x Bluetooth speaker 1 x charging cable