Product information:Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Frequency response range: 100HZ-20KHZ Output power: 8W*2 Signal to noise ratio: 75dB Power supply mode: built-in lithium battery Number of speakers: 2 Effective distance: 30M without obstruction Operation mode: button Shell material: metal+ABS+silicone Speaker adjustment method: button Is there a radio function: Yes Appearance size: 20.5*7*8.5cm Product weight: 0.85 (KG) Packing list: speaker + charging cable + audio cable + lanyard + manual Package type: standard Color: black, red, green, light blue, light gray Battery capacity: 3000 mAhPacking list:- 1x Bluetooth SpeakerMore details and products on our website: www.golooc.com