gm 21General Mobile’s GM 21 Plus is an upgraded version to the standard GM 21. The model has better CPU and slhtly better camera setup. It comes in a 6.53-inches screen with 720 x 1600 HD+ pixels resolution. Above the screen is a dewdropVOX function can achieve hands-free operation while driving. It is comes with 30 GMRS channels and 10 NOAA weather channels, compatible with FMUHF220