Additional Details ------------------------------ Product description: The Yealink W78P, a high-performance SIP cordless phone system that can register 10 Yealink DECT W78H handsets, is the ideal solution for small and medium-sized businesses. It features more functions, lines, and mobility. It supports up to 10 SIP accounts and 20 simultaneous calls, improving signal strength and responsiveness to provide a stable and good experience for your mobile communications. What’s more, you can enjoy maximum freedom and flexibility with W78H. You can choose a Bluetooth headset or wired headset on your demand, with the Bluetooth 5.1 and a 3.5 mm headset jack. Thanks to the vibration alarm, you are guaranteed not to miss any call, even in noisy and stressful situations.