NGS Roller Flow, 10 W, 100 - 20000 Hz, 20 W, Wired & Wireless, 2.1+EDR, 393.7" (10 m) NGS Roller Flow. RMS rated power: 10 W, Frequency range: 100 - 20000 Hz, Peak Music Power Output (PMPO): 20 W. Connectivity technology: Wired & Wireless, Bluetooth version: 2.1+EDR, Bluetooth range: 393.7" (10 m). Product color: Black, Product design: Tube, Volume control: Digital. Recommended usage: Universal, Compatible memory cards: SD. Power source type: Battery, USB, Battery life (max): 5 h, Battery recharge time: 2 h