Netgear's Arlo Go camera goes the distance thanks to LTE

The Arlo Go by Netgear costs $400/£339/AU$599. 

This 720p HD live streaming camera detects motion and sound.

It's powered by a rechargeable battery and connects over LTE network via a SIM card. MicroSD cards up to 32GB are supported, but not required, since Netgear offers 7 days of free clip-based cloud storage. 

The Go also works with Amazon Alexa and Google Assistant.