The modernly designed business devices use encryption and are compatible with telepresence and HD telephony. Optionally, headsets and auxiliary modules with LCD can be connected to expand the function keys/line keys. Different colors are available The devices are suitable for communication-intensive workplaces, but also for boss/secretary use. In a market-wide comparison, the 88xx series telephones from Cisco are extremely energy-efficient - despite the large displays, High PowerUSB, Gigabit and partly with Bluetooth/ WLAN, thanks to EnergyWise, network-controlled energy saving. With Cisco Intelligent Proximity, contacts and call lists can be shared and calls from a mobile phone can be transferred to the 8800 series. A five-way navigation wheel makes navigating through the menus easy: The content displayed can be easily recognized on the five-inch, high-resolution display even in poor lighting conditions.