New rig by Qixiang Electron Science & Technology Co., Ltd. Not the same as the old AT-5555. Link to You Tube will tell you more than I can....
Anytone AT5555N & AT6666 - YouTube
Comparison to the AT-6666 at same time, kinda short?
73 mechanic
Anytone AT5555N & AT6666 - YouTube
Comparison to the AT-6666 at same time, kinda short?
73 mechanic