Moshi Vortex Air. Product type: Headset, Wearing style: In-ear, Neck-band, Recommended usage: Calls/Music. Connectivity technology: Wireless, Bluetooth profiles: A2DP,AVRCP,HFP,HSP, Wireless range: 393.7" (10 m). Ear coupling: Intraaural, Impedance: 18 Ω, Headphone sensitivity: 100 dB. Microphone type: In-line, Microphone sensitivity: -39 dB. Battery technology: Lithium Polymer (LiPo), Battery capacity: 100 mAh