Audio-Technica Headset - In-ear - Black - Binaural - Wireless - Micro-USB

Audio-Technica ATH-CKR7TW. Product type Headset. Wearing style In-ear. Recommended usage Calls & Music. Connectivity technology Wireless. USB connector Micro-USB. Bluetooth profiles A2DP.AVRCP.HFP.HSP. Ear coupling Intraaural. Headphone frequency 5 - 45000 Hz. Impedance 16 ?. Microphone type Built-in. Microphone frequency 50 - 4000 Hz. Microphone sensitivity -38 dB. Battery type Built-in battery. Battery technology Lithium-Ion (Li-Ion). Battery life (max) 6 h