Jabra Evolve 65+ MS Mono, Wired & Wireless, Office/Call center, 20 - 20000 Hz, 310.3 g, Headset, Black Jabra Evolve 65+ MS Mono. Product type: Headset. Connectivity technology: Wired & Wireless, Bluetooth. Recommended usage: Office/Call center. Headphone frequency: 20 - 20000 Hz. Wireless range: 30 m. Weight: 310.3 g. Product colour: Black