Retired, information for reference only.
These are bare ESP8266EX ICs in lots of 10. They're the original revision 0 chips.
Package type - QFN-32_5x5x05P
Datasheet - https://datasheet.lcsc.com/lcsc/1810101410_Espressif-Systems-ESP8266EX_C77967.pdf
This is a brand-new, old-stock item that has been in storage. Full warranty and technical support. Click here to learn more.