Rechargeable Battery Upgrade your sound with the V-4031 Wireless Portable Speaker – designed for powerful audio and everyday versatility. With 10W output and dual 4-inch woofers, enjoy deep bass and clear sound wherever you are. ✅ Powerful 10W Sound – Dual 4-inch woofers deliver crisp highs and rich bass. ✅ Multiple Connections – Play music via USB or TF card with ease. ✅ Rechargeable Battery – 1500mAh (3.7V) battery for hours of uninterrupted music. ✅ LED Display – Modern design with vibrant display for added style. ✅ Portable & Lightweight – Perfect for parties, travel, or daily use. ✅ Wide Compatibility – Works seamlessly with smartphones, tablets, and media devices. Comes complete with USB charging cable and user manual – ready to use right out of the box.