It is compatible with all BT cell phones, it beautifully works in office. Enjoy fun of wireless via an BT dongle, it works well with SKYPE, MSN, and . Crystal clear sound can thoroughly release your hands to enjoy your work! Features - ColorBlack - Material: ABS - Size: 13x12x4cm / 5.1x4.7x1.6inch(LxWxH) - version: V2.1+EDR - Answer/end/refuse call, : support - Volume control: Support - Voice dialing: support - Mic angle adjustable: 300 degrees adjustable - Multipoint support: 2 connections simultaneously - Over-the-Head design - Noise cancelling crystal clear sound - : Up to 18 hours - Standby time: Up to 180 hours - Rechargeable BATTERY Li-polymer - : CE, - Working range: 30ft - Answer calls: When there is a phone call coming, please press the multifunction answer the phone. - Refuse calls: When you want to refuse to the call, please long time press the multifunction refuse the phone call. - Redail calls: Please double press the multifunction the last phone call. - Voice Dialing: Please press the multifunction time, you will hear a prompt, then say the name of the person you wish to call loudly(this function on whether your cellphone support voice dialing). - Multipoint support: 2 Connection Simultaneously. Ultra fashion, Balanced, compact and light-weight design for comfortable fit. - Ultra-Long playing time: Up to 18 hours and 180 hours standby time. - Call waiting, 3-way calling and voice activated dialing, Call answer / and , refuse incoming calls. - Easy operation and quality, Enjoy of and comfort of talking on your cellphone without the drawbacks of headphones. Package list: 1 x Hand-free Stereo Headset Headphone Earphone for Mp3 Player and Smartphone (Black)