<b>Specification:</b><br><br> Material: Aluminium Alloy <br> Weight: 365g(12.87oz) <br> Output Power: 6W(Speaker Output) <br> Charging Voltage: DC 5V <br> Charging Time: 4 hours <br> Sing Time: Up to 3-4 hours <br> Battery Capacity: 1800mAh <br> Products Size: 9.45*2.95*2.36in <br> Speaker Frequency: 100Hz-10KHz <br> Transmission Distance: 10m(32.8ft) <br> Power Supply: Build-in Li-ion battery <br> Reverb Mode: Echo sound reverberation <br><br> <b>Package Includes:</b><br><br> 1 x Karaoke Microphone <br> 1 x Micro USB Cable <br> 1 x Instruction Manual