SPEC'S can be found here www.samsung.com/au/audio-devices/soundbar/2-1-ch-soundbar-bl…
320watt, 2.1 with separate wireless subwoofer & you can cheaply upgrade it to a 5.1 with the optional rear SWA-8500S/XY speaker kit!
HDMI+Optical input (use HDMI and it will switch on/off with the TV and TV remote will control sound too) as well as BT wireless streaming from a mobile phone too.
Wireless Rear Speaker Kit Supported with the optional (SWA-8500S/XY – sold separately)
https://www.buysmarte.com.au/samsung-swa-8500s-wireless-rear…
But it's not necessary but rather just a nice to have the option if you can find them at or under $150
Looks like several reviewers are saying if you connect those rear speakers to a 2.1 system it just provides a copy of the front speakers but at a lower volume - more of an ambience thing than a true 5.1 system. Not sure how they'd go with this one? But a great price on the soundbar itself.