The selector switch on the KBGV Select allows you to choose between brewing a half or full carafe. The brewing speed and hotplate temperature adjust according to your choice, brewing either amount to the golden cup standard. The brew basket automatically stops the flow of coffee when removing the carafe. All glass carafe brewers feature a hotplate with an independent heating element that holds your coffee at the perfect temperature. Note: 1)Too coarse a grind, too little coffee, or insufficiently tamping the grounds before brewing can all lead to inadequate pressure for a proper brew. 2)It is important to note that the amount of espresso extracted will vary depending on the grind size and amount and reprogramming may be needed when the size and amount are adjusted Perfect Coffee Every Time: This pump-free coffee maker heats water to the correct temperature for coffee extraction Brew-Volume Selector switch for brewing half or full carafes Easy to Use: The Moccamaster brews a full 40 oz pot of coffee in 4-6 minutes using one switch Quiet and Safe: The Moccamaster Select quietly brews your coffee and automatically turns off after 100 minutes