Apple Watch.
Purely a BT accessory for an iPhone. Even the strap costs more than competitors.
Since most of cost of a phone is (a) screen based on size and (b) there is overhead of phone royalties the BT only Apple Watch ought to be less than $25 if it wasn't Apple and about $49 for an Apple model. I know Apple fans that had sold them on to unsuspecting "marks".
It's a scam.
The DZ09 is pretty poor, but still better value. It even works as GSM phone on its own and has about twice battery life of Apple model. About £12 / $16 because it's a bit obsolete and clunky. Camera is only 320 x 240 but it does take a Micro SD card, charge or connect (USB storage) via micro USB. The Alarms, BT remote (hands free if driving?) to regular phone and sound recording all work.
Biting the hand that feeds IT
