Features: 1) Product name: Bluetooth stereo headphone 2) Hardware version: Rev.R03 3) Bluetooth specification: Bluetooth 1.2 complian 4) Support profile: A2DP, AVRCP, headset, handfree 5) Power class: Class 2 6) Frequency range: 2,402 - 2,480MHz 7) Spread spectrum: FHSS (79 channels) USA/EU 8) Modulation: GFSK(Gaussian Frequency Shift Keying) 9) Interoperability: all devices support the Bluetooth 10) A2DP, AVRCP, HS/HF profile