The is the three stack flytower from HGLRC. It has a video transmitter that is 25/100/200/350mW switchable. This is the stack that is used in the HGLRC XJB-145MM drone.
https://www.banggood.com/20x20mm-HGLRC-F438-TX20-V2-Flytower-Micro-F4-Flight-Controller-38A-BL_S-ESC-25100200350mW-VTX-p-1242999.html?rmmds=search&cur_warehouse=CN
