ACEFAST K4 Go Portable Waterproof Speaker

The ACEFAST K4 Go is a compact, rugged portable Bluetooth speaker built for both travel and daily use. Weighing just 200 g and wrapped in a durable mesh design, it’s easy to hang or carry thanks to its built-in strap. Under the hood, it packs a 45 mm full-range driver paired with a passive diaphragm for richer bass and clear mids. Connectivity is handled via Bluetooth 5.4, delivering stable wireless range up to about 10 m. The 900 mAh battery supports up to 8 hours of playtime and recharges in roughly 1.5 hours via USB-C. With a rated power of 4 W (5 W peak), it punches well above its size. What really sets it apart for outdoor or wet environments is its IPX7 waterproof rating, meaning it can survive being briefly submerged — ideal for camping, beach, or poolside adventures. Plus, you can pair two of the K4 Go speakers using TWS (True Wireless Stereo) for a richer stereo sound experience.