TomTop offers the Neo Coolcam NAS-DS01Z Wireless Door / Window Motion Sensor
with free shipping
. That's the lowest price we could find by $5. It's compatible with Z-wave 300 Series and 500 Series, and features an indoor range of 98 feet, 868.4MHz radio frequency, and a 2-year battery life.
Note: This item ships from China and may take up to four weeks to arrive.