Feature: 1. SUPPORT UP TO 32G: Bluetooth speakers can play MP3 WMA format sound files from small memory card and USB flash drive. 2. FM RADIO FUNCTION: Portable bluetooth speaker has a built in 87.5‑108MHz FM digital radio module, which can automatically store 50 radio stations. 3. ADJUSTMENT KNOB: Portable bluetooth boombox has independent high and low sound adjustment knob, bluetooth 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. Specification: Item Type: Speaker Material: ABS Bluetooth Protocol: V4.2 Connection Distance: Approx. 10m/32.8ft Fm Frequency Range: 87.5-108Mhz Response Frequency: 150-20Khz THD: 0.5% SNR≥80dB Built in Polymer Li Battery: 3000mAh. Package List: 1 x Speaker1 x Charging Cable1 x Instruction Manual1 x Carrying String