Bluetooth wireless connection, getting out of the trouble with surrounding you for line-control headset, so it's more convenient to communicate. You can adjust the ear hook.. Appreciate the flexible, soft-touch headset that delivers a comfortable fit on either ear Fashionable appearance, smart model portable With volume control button. Especially design Bluetooth indicator, which is very noble. Take advantage of the noise-canceling microphone to get great sound from noisy environments . One-year limited warranty Product specification: Technology:Bluetooth v1.2 compliant(compatible with bluetooth 1.1) Talk time up to 6 hours. Standby time up to 145 hours. Broadcasting range of 10m(30inches) Weight:about 18g. Chipset:CSR Radio Performance:Class II