Recommendations on a Door Sensor

[Smartphi]

Visionic respnse is super fast and lower profile.
Slightly Lower price directly from website instead of amazon.

Door sensor question

Get Visonic cheaper instead of amazon https://www.mydigitaldiscount.com/visonic-window-or-door-sensor-for-samsung-smartthings-mct-340e/ $14.20 or wait until the next promo when mydiditaldiscount drops sensor price to $10 maybe even lower with all the lowes contact sensor deals lately.