The ESP32-WROOM-32U is a WiFi and Bluetooth module using the popular Espressif ESP32 chip. The pads on the module have a 1.27mm spacing. This is a original module, manufactured by Espressif.
To view the PDF Datasheet, click here.see this page: 
99tech.com.au/m/esp-wroom-32u_32d_datasheet.pdf
This is the 16MB (128MBit) version of this module. It is available in a 4, 8 and 16MB versions.
Specifications
- Manufacturers Part Number: ESP32-WROOM-32U-N16
 - Manufacturer: Espressif
 - CPU: Xtensa® 32-bit LX6 Dua-core processor, up to 600 DMIPS
 - Speed: 80 MHz to 240 MHz
 - Chip: ESP32-D0WD
 - Flash: 16 MByte(128Mbit) SPI
 - ROM: 448 KByte
 - SRAM: 520 KByte
 - RTC SRAM: 16 KByte
 - WiFi Protocol: 802.11 b/g/n (802.11n up to 150 Mbps)
 - WiFi Freqency: 2412 ~ 2484 MHz
 - Bluetooth Protocol: v4.2 BR/EDR and Bluetooth
 - Antenna Connector: IPEX(U.FL)
 - Package: 38pin SMD Module
 - Size: 18 x 19.2 x 3.2 mm (±0.2mm)
 - Operating Temperature: -40°C ~ 85°C
 - Supply Voltage: 3.0V~3.6V
 
Package Includes
1 x ESP32-WROOM-32U
 
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