Esperanza Libero EH163K Headset Wireless Head-band Music Mini-USB Bluetooth Black

Width: 180 mm Weight: 168 g Height: 140 mm Depth: 80 mm Foldable: Yes Product colour: Black Product type: Headset Headset type: Binaural Recommended usage: Music Operating keys: Multi-key Wearing style: Head-band On/off switch: Yes 3.5 mm connector: No Bluetooth profiles: HFP Connectivity technology: Wireless Bluetooth version: 3.0+HS Wireless range: 10 m USB connectivity: Yes Bluetooth: Yes USB connector: Mini-USB Rechargeable battery: Yes Charging source: USB Continuous audio playback time: 4 h Battery technology: Lithium Polymer (LiPo) Battery capacity: 300 mAh Battery operated: Yes Talk time: 10 h 2.5 mm connector: No Audio output channels: 2.0 channels Charging voltage: 5 V Microphone type: Not available Ear coupling: Circumaural Impedance: 32 Ω Headphone frequency: 20 - 20000 Hz Driver unit: 4 cm