The RG406V is the successor to the RG405V, with the same size screen and the same rounded corners, but with better performance expected from a more powerful Tiger T820 processor.
Display
4.0-inch IPS touchscreen / 960x720
System on Chip
Unisoc T820
CPU
Cortex-A76 (x4) + A55 (x4)
Memory
128GB UFS 2.2 + microSD card slot
Analog Sticks
Dual analog thumbsticks (hall effect)
Face Buttons
A + B + X + Y, Select, Start, Home/Back
Shoulder Buttons
L1 + R1, L2 + R2 (shelf)
Additional Buttons
Power, Volume +/-
Dimensions
145 mm x 105 mm x 29 mm