iBox BH4 Headset Wireless Ear-hook, In-ear Calls/Music Black

Wearing style: Ear-hook, In-ear Headset type: Monaural Recommended usage: Calls/Music Product colour: Black Product type: Headset Package type: Display Quick start guide: Yes Quantity: 1 Frequency band: 2.4 GHz Connectivity technology: Wireless Battery recharge time: 2 h Battery technology: Lithium-Ion (Li-Ion) Talk time: 4 h Battery capacity: 80 mAh Continuous audio playback time: 150 h Charging time: 2 h Manual: Yes Microphone sensitivity: -42 dB Microphone type: Built-in Headphone sensitivity: 112 dB Impedance: 32 Ω Acoustic system: Closed Headphone frequency: 20 - 20000 Hz Ear coupling: Intraaural