Can actually Bluetooth 2.0 to 4.0 Voice quality is good, the noise canceling function works well. Battery life is not measured, but keeps loose by one working day. Is small, lightweight and looks good. 2 drawbacks: - The headset will turn off after about 90 minutes. Then automatic reconnect must be switched on again, without any problems. - The announcements are not just in Oxford English, which is good but bearable.
Total: Top price / performance ratio. Would buy again.