No wires, no limits and Bluetooth wireless technology Stylish and comfortable design True freedom to talk wirelessly in office or in car Easy one touch operation Noise reduction and echo elimination Multifunctional: volume adjustment, mute function, voice dial and redial Left/right ear wearable Can be connected with other Bluetooth devices, such as PDAs and computers Bluetooth V1.2 wireless technology Security: encrypted link Frequency range: 2.4 to 2.48GHz Channels: 79 Range: up to 30 feet (10 meters) Small and light: 6.7cm length and 7.5g weight Selectable accessory: car charger