The male elbow type of the 4Pin molded M12 connector is like a nimble "circuit dancer". Its unique curved shape is carefully designed to cope with the cramped and irregular spaces inside complex equipment. The pins of it have a smooth transition at the elbow part, which effectively avoids stress concentration and ensures that the signal will not be damaged during long-term use. When it is applied to the connection between the flight control system and the battery of small drones, within the narrow fuselage space, it can achieve a compact and stable connection with just the right bending angle, ensuring the stable transmission of power and control signals and helping the drones to fly lightly. In portable medical monitoring devices, it can also turn flexibly within the limited casing, making it possible for the devices to be portable and multifunctional.