I prefer these so it's hidden away on top of the door. Sensative Z-Wave Plus Ultra Thin Door/Window Contact Sensor Strips Guard, Good for Outdoor Installation https://smile.amazon.com/dp/B01LWMTUI8/ref=cm_sw_r_cp_apa_i_A2wiCbZCPBHC0
I've started using these and have been very impressed with how well they work. They're also completely hidden which is nice.