The Veho MZ-9 Fortify portable Bluetooth wireless speaker boasts a powerful 100 watts (RMS) output with 4.1 Tri-wave subwoofer and mid-high frequency tweeters. It features up to 10 hours of playtime from a single charge and TWS twin pairing mode, allowing you to easily pair two speakers to play simultaneously. A strong carry handle and strap, along with a waterproof rating of IPX6, make the MZ-9 a perfect outdoor speaker.