Alienware AW988. Product type: Headset, Wearing style: Head-band, Recommended usage: Gaming. Connectivity technology: Wired&Wireless, USB connector: Micro-USB, Frequency band: 2.4 GHz. Ear coupling: Circumaural, Headphone frequency: 20 - 20000 Hz, Impedance: 16 Ω. Microphone frequency: 50 - 20000 Hz, Microphone direction type: Unidirectional. Battery technology: Lithium-Ion (Li-Ion), Battery life (max): 14 h, Battery capacity: 1200 mAh