Yealink wireless Bluetooth handset BTH58 adopts Bluetooth 5.0 technology. The effective communication distance is up to 10-meters, or approximately 30 feet. With Yealink T58W or MP58 phones, you can leave your desk to find documents and get coffee when making phone calls, greatly improving working efficiency and flexibility. With HD speaker and microphone, BTH58 brings you the ultimate calling experience. The 10% anti-packet loss rate can make the call more stable, thus maintaining the clear and high fidelity voice quality.