Detailed Product DescriptionCappuccino Buletooth with SD slot
3, Using low-frequency enhancement technology
4, Using anti-breaking sound’s technology
5,Loudspeaker : 40mm 3Ω 3W
6,Working voltage: 3.7V, worked by Lithium battery built-in (400MAH)
7,With charging function, charging voltage: 5V
8, SNR>95DB, Frequency Range: 90HZ ~ 18KHZ, THD<0.5%
With mini SD card function and Li battery