Stereo bluetooth headset Features: 1) hands-free bluetooth stereo earphones 2) bluetooth v 1.2 edition 3) frequency:2.4000 2.4835ghz unlicensed ism band 4) channels:79 channel intervals:1mhz 5) standby time (max. ):180hrs 6) talk time/playing time:6hrs 7) range:15m 8) power supplying (standby time):0.03w 9) battery (polymer):180ma 10) support: profile headset profile/hands-free profile 11) power consumption:1.8v (working)/5v (charging) 12) operating temperature:10 - 50oc 13) automatic selection 14) basic call handling from the headset with adjustable volume control 15) also can enjoy stereo music with hi-fi stereo bluetooth adapter or Usb bluetooth adaptor and mp3 player or computer Giftbox