Bluetooth 2.1 Wireless Headset Class 2 Product Type - Headphone Kit Warranty - 1 year Warranty - 1 year Light and attractive design Supported Voice-Over-IP programs Skype v1.3, MSN Messenger v4.7, Yahoo Messenger v7.0, AOL Instant Messenger v5.9, and Google Talk. Requirements - CELL PHONE---Bluetooth cell phone with either headset profile or hands-free profile , Compatible with most brands supporting the Bluetooth 1.1 specification - Nokia, Motorola, Siemens, Sony Ericsson