The AERO SELFIE 4IN1-ESC-POWER Adapter Board 320A is a high-efficiency, open-source power distribution module designed specifically for drone developers, engineers, and robotics enthusiasts. Engineered by Shenzhen Ruijie Innovation Technology Co., Ltd., this compact board enables clean and stable energy transfer between a drone's battery and up to four brushless electronic speed controllers (ESCs)—making it a vital component for advanced drone power systems. Supporting a wide input voltage range of 3S to 10S (13.2V–44V), and an optimal operating range up to 8S, this adapter ensures consistent performance in various UAV configurations. The board provides continuous 3A at 5V and 2A at 12V, catering to a range of motor and peripheral needs without requiring additional regulators. It features natural cooling for thermal stability, removing the need for bulky heat sinks or fans. Weighing only 13.9 grams and measuring 44mm x 44mm x 6mm, with standard 30.5mm x 30.5mm M4 mounting holes, the board fits easily into tight drone builds. The integrated ammeter and power detection function (18:1 adaptation ratio) provides real-time feedback for system monitoring—ideal for debugging, tuning, and optimizing UAV power usage. Built to withstand harsh environments, the board operates in temperatures from -10°C to +50°C and humidity levels from 10% to 95% (non-condensing), ensuring reliable operation in field testing and real-world drone missions. Whether you're developing open-source drones, building industrial UAV prototypes, or working on custom robotics projects, the AERO SELFIE 4IN1-ESC-POWER Board offers a powerful, lightweight, and scalable solution for power management.