[Product weight]：1.4±0.1g

[IC]：ESP8266

[Frequency]：2.4GHz

[Distance]：300m

[Interface]：UART/HSPI/I2C/I2S/IR Remote Control

[Introduction]：ESP-WROOM-02D is ESP8266EX-based modules,Compared to ESP-WROOM-02, the RF performance of ESP-WROOM-02D and ESP-WROOM-02U are optimized. Besides, ESP-WROOM-02U integrates a U.FL connector.