Bluetooth speaker for mobile phone $ 12.55 Type: Bluetooth speaker Connection mode: Bluetooth connection Interface type: USB Battery capacity: 500mah Frequency response range: 100Hz-20KHz Output power: 5W Signal to noise ratio:75db Power supply mode: built in lithium battery Channel: 2.1 Duration: 2 hours Extended storage: 32GB Bluetooth protocol: 4.1 Number of speakers: 1 Effective distance: 10M Function: card, radio Operation mode: key Shell material: plastic Supported format: U disk TF memory card Speaker adjustment mode: key
