M005 Bluetooth Portable Wireless Speaker with 2x Microphone (USB/AUX)Model Number: M005Charging time: 2-3HInput current: 2ABattery voltage: 5.0VBattery capacity: 3000mAHBattery type: 18650 lithium batterySpeaker impedance: 4 ohmsSNR (Signal to Noise Ratio): 80dBFrequency response: 100-16KHZHorn (Speaker driver): 4x2Working Distance (BT range): 10MWorking Time (medium volume): 3-4HMaximum supported memory card capacity: 16GBInput Voltage: DC 5VOutput power: 15W x2Standby time: 500MVAudio format: WAV/MP3Distortion: 10%Product Size: 335x173x253 mm