Feature:1. SUPPORT UP TO 32G: speakers can play MP3 WMA format sound files from small memory card and USB flash drive.2. FM RADIO FUNCTION: Portable speaker has a built in 87.5‑108MHz FM digital radio module, which can automatically store 50 radio stations.3. ADJUSTMENT KNOB: Portable boombox has independent high and low sound adjustment knob, connection can play songs.4. UPGRADED DESIGN: Wireless speaker design AUX sound input interface, dual microphone input interface, speaker parts with flashing light effect.5. RECHARGEABLE: Outdoor wireless speaker with built in rechargeable battery is suitable for family, party, camping and travel.How to Use:1. Knob button, Bluetooth pairing mode open2. Mobile phone connection Bluetooth pairing can be completedSpecification:Item Type: SpeakerMaterial: ABSBluetooth Protocol: V4.0Connection Distance: Approx. 10m/32.8ftFm Frequency Range: 87.5-108MhzResponse Frequency: 150-20KhzTHD: 0.5%SNR≥80dBBuilt in Lithium Battery: 3000mAh Package List:1 x Speaker1 x Charging Cable1 x Instruction Manual1 x Carrying String