Razer Hammerhead True Wireless Pro Earbuds (RZ12-03440100-R3G1) - Frequency Response: 20 Hz - 20 kHz, Impedance: 16 Ω, Battery life: Up to 20 Hours Total (4 for Earbuds + 16 for Charging Case), Compatibility: Devices with Bluetooth audio capability, Smartphone app available for Android and iOS, Supported codecs: SBC, AAC, Connector: Bluetooth