Switch details its three play styles, battery life, 8 systems can be connected locally

More details on Switch from the presentation:

TV mode

– Play games on TV in typical style

Tabletop mode

– Stand Switch console up with kickstand and play with Joy-Con
– Play games in front of a screen with others even away from TV

Handheld mode

– Attach Joy-Cons to the system
– Can take it with you, outdoors, anywhere you like
– Share Joy-Con with someone else

– Battery life 2.5 – 6.5 hours
– Can play while charging system with AC adapter and USB certified batteries
– Touch panel
– Can connect over Wi-Fi for battles
– 8 systems can be connected for local wireless