Crystal-Clear Audio, High-Quality Conversations Combining high quality hardware, sophisticated acoustic algorithms and noise cancellation technology, Yealink W78H performs audio delivery with enlarged volume and depressed noise, making every conversation featuring clear and clean voice. With enhanced signal processing performance, this new handset also ensures a more stable and consistent mobile communication experience. User-Friendly Features, Maximum Flexibility Built-in Bluetooth With built-in Bluetooth 5.1, the Yealink W78H integrates wireless communication into the business elite's work routines. Connected with Yealink BH72/BH76 headset, it empowers customers to free their hands and work while taking calls. Vibration Alarm Every new message can be critical to the business, and the vibration alarm feature makes sure that every call is noticed, even in cluttered and stressful environments. Missing calls will not be your concern. Quick Charging Long charging time will reduce work efficiency, but that will not happen with Yealink W78H. 10-minutes charging time can outlast two hours of talk time, so even if you forget to charge, you don't have to worry about work being delayed. Multiple Choices, Seamless Compatibility Yealink W78H is compatible with DECT bases of single cell (W70B) for small- to medium-sized business as well as multi-cell(W80DM/W90DM) for larger spaces, providing superior mobile communication experience with seamless handover and an industry-leading roaming solution to meet diverse needs of scalable DECT solutions.