Dell Small Business offers the Samsung SmartThings Multipurpose Sensor for a discounted price of $29.99 plus free shipping. Limited time offer. You save $10 off the price! That's the lowest price we could find. Amazon also offers the  Samsung SmartThings Multipurpose Sensor for $29.99 but shipping is not free unless you have Amazon Prime.

• No wiring or installation needed
• Check whether doors, windows, or garages are closed
• Receive immediate alerts if doors or windows open unexpectedly
• Place on cabinets to know if children are accessing off-limits areas
• Monitor temperature changes in your home
• One-year limited warranty