Ditch extra gadgets-sing via Bluetooth 5.3 or TF card, and pair 2 mics via TWS technology for duet singing (no wired setup needed). All-in-One 3-in-1 Kids Karaoke Microphone & Speaker with TWS Duet: Designed for 3-12 year old boys & girls, this portable wireless mic combines karaoke machine, high-fidelity speaker, and 5-mode fun voice changer in one. Turn bedrooms, parties, or road trips into lively stages with crystal-clear sound and built-in effects 5 Silly Voice Modes for Endless Fun: Switch between McKing, Monster, Girlish, Adorable, & Robot voices to spark creativity, plus 3-layer noise reduction for crisp vocals.