The controller functions as a secondary controller released for the console, available separately. The Wii U system can be connected to up to four Wii U Pro Controllers at one time, however
Super Smash Bros. for Wii U allows the usage of up to 7. It features standard
analog sticks (that can now be pressed in) and face buttons. Like the Wii U GamePad and Classic Controller Pro and unlike other eighth generation controllers (i.e., the
DualShock 4 and the
Xbox One Controller), the triggers are digital (i.e., not analog). The Wii U Pro Controller uses the same 1300
mAh CTR-003 battery found in the
Nintendo 3DS and
2DS, which can last up to 80 hours before needing to be recharged. The charging cable could be plugged into any USB port 5V ~1A. Nintendo states that the design of the Pro Controller is an "enhanced version" of the
Wii's
Classic Controller and "offers a richer experience". Certain games with flexible control schemes, such as
Call of Duty: Black Ops II and ''
Trine 2: Director's Cut'', are also compatible with the Classic Controller. The Wii U Pro Controller is not compatible with previous-generation Wii games. ==References==