Samsung NP-NC20 User Guide - Page 117

Stopping a Bluetooth device Right-click the Bluetooth icon on the Taskbar and select Stop the Bluetooth device.  It is recommended using only one Bluetooth device at a time as connecting multiple Bluetooth or other wireless devices at the same time may slow or destabilize the Bluetooth connection.  Data communications via Bluetooth may be poor when the CPU load is at full capacity or there are insufficient system resources. To use a Bluetooth device after stopping it, select Start Bluetooth device like above. Usage Instructions  Generally, Bluetooth devices deliever stable performance while connected within a 3m(10 ft.) distance.  For Bluetooth to operate smoothly, use the computer in an open environment with no walls or obstacles in the way and having low radio interference.  The Bluetooth function of a Bluetooth PDA, mobile phone, mouse or keyboard may be turned off. To use them in connection with a Samsung computer supporting Bluetooth, you must check if the Bluetooth function of the device to connect to is turned on. For the procedures on turning on the Bluetooth function of a device, refer to the relevant device manual.  The services provided by Bluetooth devices may vary depending on their capabilities. For the services provided by the Bluetooth device, refer to the device manual.  You can connect to only one Bluetooth device at a time for a phone connection, data syncing, electronic business card exchange, FAX transmission/reception, sound related functions, and serial port functions. 116