How to load EGZUMER on Retevis RA-79. (Quansheng)

Installing EGZUMER v0.21 on a Retevis RA-79 (Quansheng UV-K5) for the first time. Including basic on air testing FM AM USB.

Download Egzumer here. https://github.com/egzumer/uv-k5-firm...
Retevis RA-79 (Quansheng UV-K5).
Buy Retevis RA-79 Amazon (low stock). https://www.amazon.co.uk/dp/B0CD3DMG56
Buy Retevis RA-79 2 pack Amazon (low stock). https://www.amazon.co.uk/dp/B0CD3F7WVZ
Buy Retevis RA-79 Amazon 2 pack with mic. https://www.amazon.co.uk/dp/B0CD3GKK8R
Buy at Retevis main site. https://www.retevis.com/ra79-multi-ba...
Retevis cable driver here. https://www.retevis.com/ra79-multi-ba...
Retevis Amazon program cable. https://www.amazon.co.uk/Retevis-Prog...