Portable sound card for recording and singing,original one-click VST audio effects, easy and effective,professional voltage limiting technology to avoid voice cracking. Features： 1. Equipped with two microphone jacks to realize two-person singing together on one device; 2. Professional voltage limiting technology to avoid voice cracking at high volume; 3. Connect to phone/tablet to freely enjoy online karaoke; 4. Powerful and user-friendly PC control panel, easy to operate; 5. Original one-click VST audio effects, convenient and effective; FAQ: How can I connect instrument? You can connect your instrument to Instrument In jack. If there isn’t any sound after you connect to this jack, you may buy an instrument amplifier in your local market to connect them. What should I do if either my audience or myself cannot hear any sound (microphone sound, music played on your computer etc.)? Step 1: referring to the Wiring Diagram, you must make sure of the right connections. Step...