speaker,Cycling speakers system,sport speaker speaker,Cycling speakers system,sport speakerBuilt-in rechargeable lithiumion batteryOutput Power: 5WDriver Unit:40mm 4Frequency Response: 100Hz-20 KHzDimensions: 60×30mm( Dia x H )Size of Packing: L105XW40XH115mmCarton Box Size:L510XW280XH480mm