Here is a smart environment sensor that helps you keep your pets safe. The RV PetSafety Pet Monitor 4G Lite doesn’t require WiFi to work. It connects to Verizon 4G to offer 24/7 SMS and email alerts. You can configure up to 5 emails or mobile numbers to get pet safety alerts.
The Pet Monitor 4G sensor has a rechargeable battery that lasts up to 2 days. It has a peel & stick design, so you can easily install it in your vehicle.[where to get it]