Promate VocalMic Multi-Function Karaoke Microphone with Built-In Speaker - RGB - Black 5in1 microphone; Bluetooth Speaker; Voicerecorder; Voice Changer Bluetooth Version5.0 Battery Capacity: 3.7V 2500 mAh, 9.25Wh Input Rating: DC 5V/1A - Microphone Type: Condenser Microphone Pickup Pattern: Cardioid Microphone Sensitivity: -40dB - Microphone Frequency Response: 100Hz-20kHz Microphone Impedance: 2.2K Ohms Speaker Driver: 52mm Speaker Output Power: RMS 7.5W, MAX 10W Speaker Frequency Range: 130Hz-20kHz Speaker Impedance: 3Ohms Operating Distance: 10m Total Playing / Usage time: 3hrs @100% Volume; 10hrs @ 50% Volume 2 Years Warranty Period