Speed Cube Timer from Moyu
You can solve as fast as you like, but if you have no timer to crush at the end, then what's the point?!
This is Moyu's take on the traditional style speedcube timer.
This model has studs included so you can upgrade your current stud-less mat, or punch holes in any other mat for that matter, so your timer stays in one place when you're smashing your PB to bits!
Requires 2x AAA batteries, not included.