ESP32 is already integrated with antenna and RF balun, power amplifier, low noise amplifiers, filters, and the power management module.
The entire solution is the least amount of PCB area. this board is 2.4 GHz dual-mode WiFi and Bluetooth chips by  40nm low power technology, power, and optimized RF characteristics, which is safe, reliable, and scalable to a wide range of applications.

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Features:

1. High performance
2. Small volume, easily embedded to other products
3. Strong function, with the support of lwIP protocol, freertos
4. Support three modes: AP, STA, and AP+STA
5. Support for Lua program, easy to develop

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Package Includes:

1 x ESP32 OLED Module for WiFi And Bluetooth