Canon BR-E1 Bluetooth remote
Powershot SX70HS, G5X MkII, G7X MkII
Has a wireless range of approximately 4m.
The beauty of the BR-E1 is that it uses very little power to communicate with your camera.
When using with a compact like the SX70HS it can control the zoom.
Has a handy AF button too.
Won't take up much room in your camera bag or pocket.
Most of these cameras will run on the Canon Camera Connect App on your phone but the BR-E1 will use less power than your phone.