Yes, you can connect it with phone and talk and can use as a normal Bluetooth headset.
Yes, you will get a pair of normal earbuds and a pair of swimming earbuds.
Hold down the button (1) for 3 seconds.
You will hear the shutdown sound. Then, the Walkman and the lamp ( 2 ) will turn off.
Sony NS-WS623 is quite light weight. It weighs just about 32 grams.
Yes, it does have fast charging. Charge it for just 3 minutes and it will work for another 60 minutes.