The karaoke broadcast network mixer with sound card. They combine a traditional sound card and a mixing function.Built-in Bluetooth, connect with mobile phone and Bluetooth player.Built-in MP3 player for playing music in multiple formats and recording with LED display.Connect USB to PC to play and record music.Connect USB to PC or power bank for power, convenience for mobile connection and outdoor guitar gaming and singing.Point of Sale1. Sound Card Functions Mixer2. Bluetooth function3. USB MP3 Playback4. USB recording5. Effect: 16 delay effects6. Portable: Plastic body with USB power supplyGeneral specificationsUSB power supply and data transferConnected with the USB port of the PC,Power BankPower outletto feed the mixer.It must meet the following requirements:Output voltage: 4.8V to 5.2VUSB and Bluetooth User Manual1. Button function:a) "REC" button----Press the first time to pause the song being played.Press again to continue playing.b) Button "-" ----Press briefly to play the previous song.Long press to reduce the input volume.c) Button "+" ----Press briefly to play the next song.Long press to increase the input volume.d) "MODE" button ----Press to change functional model.Select USB, BT, REC in order.2. Bluetooth functiona) Press the "MODE" button to select the "Bluetooth" mode.After the successful selection, the Bluetooth icon on the screen flashes and displays BT.b) Open Bluetooth for pairing. After the successful pairing there will be a sound prompt.3. USB recording operationa) Press the "MODE" button to select the REC state.b) Press the "REC" button to start recording, the LED display shows the recording time.c) Press the "REC" button again to pause the recording.d) Press the "MODE" button to cancel the recording.4. Sound card functionWhen you connect the computer data cable, it automatically enters da