Question [Q] Bluetooth 4.0 LE (SMART) Suported

Hi!

I want buy a Bluetooth HRM, and there are several at good price, but all advertised bluetooth 4.0 LE mandatory...

I have a Wiko Darkfull (the French Canvas Turbo clone), and the specifications said BT 4, but this smartphone support the Low-Energy (aka Smart) feature?

If this feature depend from OS, there are any ROM that support this?