The Yealink BH71 is a single ear Bluetooth headset that loops around your ear. The lightweight headset weighs in at just 18 grams and offers up to 10 hours of talk time on a single charge. While many headsets are one size for everyone, the BH71 has an adjustable ear hook which allows you to get the perfect fit. There are three other models of the BH71, the Pro which includes the BH51 USB Bluetooth adapter and a travel case with integrated battery. The BH71 Workstation is for the office as it has a speakerphone, display and docking station with wireless charging for your cell phone. The BH71 Workstation Pro gives you the best of both worlds as it has everything that the BH71 Workstation has as well as the travel case and BT51 USB Bluetooth adapter.