Used Bluetooth digital mixer with voice control. - Model: K500 - Function: Digital Mixer - Connection Type: USB Connection - Voice Control: Microphone Volume Adjustment - Features: Bluetooth Compatible - Power Indicator: Yes - Noise Reduction Function: Yes I have confirmed that it starts up without any problems. This item does not include the original box or manual, so I will ship the main unit and a USB-C cable only. Charging works perfectly. Please check the photos carefully before purchasing. This is a used item, so please understand that it is non-refundable and non-returnable. Thank you for viewing.