Small module with ESP32C6 (4 MB flash memory), an antenna and a set of available interfaces. Dimeio: approximately 20 x 27 mm. for Internet of Things note that the space between the two rows of pi is not a multiple of 2.54 mm: it is approximately 15.4 mm. In addition, 5 solder points have special positio (for IO 12, 13, 21, 22, 23). The module integrates a charge control chip for a LION battery (solder contact under the module).