Circuitrocks - Fun project for this coming halloween walkie talkie that play sounds/voice on a designated spots!! The program is designed so that you can input 11(or however many you need) GPS
Amazon.co.jp: ESP-01 wifi Walkie Talkie Radio Module with Adapter Module for Rumpy Geekcreit R ESP8266 - : DIY, Tools & Garden
How to Make Walkie Talkie Using Arduino - Share Project - PCBWay
ESPboy Turned Into Functional Walkie-Talkie | Hackaday
Long Range Arduino Based Walkie Talkie using nRF24L01
Walkie-Talkie, Half-duplex communication based on WebSocket : r/esp32
AN ESP32 Walkie-Talkie, For Those Spy Radio Moments | Hackaday
How to Make Walkie Talkie Using Arduino - Share Project - PCBWay