White is on sale for $279.99
Black is 319.99, and blue is $349.99 (the going price when not on sale)
Note, this uses USB-C connector, not the micro-USB as in Z5 and Z3 Compact. Battery wise it's pretty good, for me it almost lasts two days for light usage. The battery care will pick up your charging habit and leaves the battery charged to 90% until right before the time you unplug it when it will charge it fully. They say this prolongs the battery life.