Professional adjustment buttons can be adjusted by the microphoneBluetooth wireless microphone and speakers, 2-in-1, no additional connection to work independentlyMicrophone head has 3 noise reduction processing,to produce more effective voice quality1800mAh battery up to 6 hours of singingCompatible with iOS and Android smart phones, iPad tablet PCs, BluetoothSpecifications: Output Power: 5W Frequency Rage: 100 HZ ~10KGZ Reverberation Mode: Sound effect reverberation Power Supply: Built-in rechargeable 18650 Li-battery Battery Capacity: 1800 mAh Charging Power: DC5V