Veho M-Series MZ-7 Bluetooth Wireless Speaker. Driver diameter: 7.5 cm. RMS rated power: 40 W, Frequency range: 130 - 18000 Hz. Connectivity technology: Wired & Wireless, Bluetooth range: 15 m, USB connector type: USB Type-C. Product type: Mono portable speaker, Product colour: Black, Product design: Spheric. Recommended usage: Universal, Compatible memory cards: MicroSD (TransFlash) , Maximum memory card size: 32 GB