Connect wirelessly for superior portability with Bluetooth technology. This Bluetooth speaker ensures fast pairing, compatibility with a wide range of devices. Bluetooth allows an instant connection with all Bluetooth-enabled devices up to 10m Uniquely enhanced stereo sound and bass with excellently clear and crisp sound fill your room. Enjoy clear sound without distortion, even at maximum volume With built-in USB port allows you to plug in your charger, so you can maintain power on the go Connection method: TF card, U disk, Bluetooth connection, FM, hands-free answering phone calls Small size, designed to be packed in your bag, stowed in your pocket Stay entertained wherever you are, from a party to the pool to your own backyard. Makes it easy to listen to music, whether youandrsquo re traveling, at home, beach, etc Specification: Connection method: Bluetooth connection Interface type: USB Frequency response range: 150HZ-20KHZ Output power: 5w Signal-to-noise ratio: andge 80dB Playing time: 6 hours Memory card: up to 32GB Bluetooth protocol: 5.0 Number of speakers: 2 Effective distance: 10 meters Operation mode: button Playback format: MP3 Shell material: plastic Supported formats: U disk Battery capacity: 1500mAh Bluetooth connection: After long press the power button to turn on the vacuum tube, the blue indicator light of the vacuum tube will be on, the mobile phone will turn on the Bluetooth, find the Bluetooth named "B9", and it will prompt a sound after connecting, and you can use the listening song function. FM Radio: Open the antenna, long press the M button for a second time, after the prompt tone is FM, rotate the radio mixer, you can hear the radio channel