Couple popular Z-wave Plus items from Monoprice can be had for a great price today and with free shipping using coupon MOTHERS15.
Z-Wave Plus® Door/Window Sensor, NO LOGO – $16.99 – https://www.monoprice.com/product?p_id=15270?
Z-Wave Plus® PIR Motion Detector with Temperature Sensor, NO LOGO – $19.54 – https://www.monoprice.c