CYBEX Sirona M SensorSafe 2.0 The CYBEX Sirona M SensorSafe 2.0 ($264) is a leader in smart tech. It's smartphone-synced, so you can track your vehicle's temperature, let you know if your kid unbuckled his seat while the vehicle is in motion, and – most importantly – alert you if you left your child in the car unattended. Image Source: Unsplash / Sharon McCutcheon CYBEX Sirona M SensorSafe 2.0 $264 from amazon.com Buy Now