1,Support Original sound elimination
2,Support bluetooth,TF card and line in mode.
3,Support microphone volume and music volume adjustment
4,Support Previous song and Next song adjustment
5,Support AUX out put
Output: 5W x 2 (speaker output)
Frequency Range: 100Hz-10KHz
Maximum sound pressure level (SPL): >115dB 1KHz THD<1% Reverberation: Echo Battery:Built-in Polymer Lithium Battery Battery Capacity: 1000mAh Charging Voltage: DC 5V Charging Time: 3 hours Battery Working Time: 4-6 Hours Package includes: 1x Microphone speaker 1x Audio cable 1x USB charging cable 1x Instructions 1x Box"