Review of Tangxi Smart USB UHF RFID Reader 915Mhz
TLDR summary: Not much documentation, works as a USB keyboard and emits the contents of tag EPC memory (hex encoded) plus a newline, decent sensitivity, seems very hackable if you are into that kind of thing.
The box contained nothing other than the reader and a mini-USB B to USB A cable.
The reader enclosure can be opened easily by removing 4x 10 mm foam pads at the bottom and unscrewing some self-tapping Phillips head screws. The enclosure measures 64 mm x 105 mm x 13.5 mm. The board inside is slightly smaller at 60 mm x 100 mm x ~9 mm. A large portion of the height of the board is occupied by two LEDs (one blue, one green) inside a large flat diffuser. If desired, the board could be stripped down by removing the antenna/LEDs/beeper and cutting a large empty part of the PCB off, resulting in dimensions 60 mm x 46 mm x 5.1 mm.
The board is essentially a MagicRF M100 module attached to an antenna and an STM32F103 c