TomTop offers the Xiaomi Multifunctional Gateway in White for $29.79. Coupon code "DSXMBL" cuts that to $23.99. With free shipping, that's the lowest price we could find by $9. It measures temperature, movement, light, and sound, functions as a bell and alarm, is compatible with Android and iOS devices, and connects with other Xiaomi smart devices.

Note: This ships from China and may take up to eight weeks to arrive. The countdown timer on the product page does not reflect an actual expiration time and resets daily.