Check the listing for details. Bluetooth Portable Karaoke Machine with Wireless Microphone (SD-513). Condition: New. Listed at 59.99 USD. The Bluetooth Portable Karaoke Machine with Wireless Microphone (SD-513) by Gnrop is a versatile karaoke system perfect for on-the-go performances or home use. This karaoke machine includes a portable microphone with Bluetooth capabilities, making it easy to connect to your smartphone or tablet for music playback. The speaker included in the package ensures high-quality sound output, creating a fun and engaging karaoke experience for solo or group performances. With its compact design and convenient features, the SD-513 is a great choice for anyone looking to enjoy karaoke with friends and family.