CoolBox H2, Wireless, 80 - 20000 Hz, Calls/Music, 110 g, Headset, Black CoolBox H2. Product type: Headset. Connectivity technology: Wireless, Bluetooth. Recommended usage: Calls/Music. Headphone frequency: 80 - 20000 Hz. Wireless range: 10 m. Weight: 110 g. Product colour: Black