... karaoke microphone 1)Audio port:2-channel 3.5mm jack 2)Switches:volume,reverb,l/r/loop magic sing along karaoke ... Built-in large capacity battery can support about 4 hour play8.Audio port: 2-channel 3. ... 26 x 15mm11.can be equipped with a microphone DC5V cable charger to charge,12.fot the ... .4. We also sell a lot of similar electronic products, varieties, good quality. magic sing along karaoke microphone