Eliminate tangled wires and cord clutter forever Fashionable appearance, smart model portable. With volume control button. Use it wirelessly with your Bluetooth mobile phone梒ompatible with all major brands noise-canceling microphone to get great sound graceful appearence Product specification: Technology: Bluetooth v1.2 compliant(compatible with bluetooth 1.1) Talk time up to 5 hours Standby time up to 120 hours Broadcasting range of 10m(30inches) Weight:about 17g. Chipset:CSR Radio Performance:Class II