The Mike terminal port has a fixed 5p male connector with four pins, and the unified mobile phone charger interface standard is Micro USB. The new Micro USB specification supports USB technology on mobile devices such as smartphones, and is ready for smaller and more compact portable devices in the future. Various portable devices such as mobile phones, MP4, digital cameras, etc. can be interconnected and communicated without PC transfer. In the future, these manufacturers will strive to adopt the Micro USB standard for their phones, making it the unified charging interface for future phones. The use of the Micro USB interface allows for charging, audio, and data connections with just one interface.

On the other hand, the achievement of this agreement is actually a result of the active promotion of the European Union. The European Union's WEEE department requires handheld device manufacturers to be responsible for waste and pollution caused by interface differences, and hopes that a unified interface protocol can reduce this waste. The EU also suggests that new phones can be packaged without a MicroUSB charger due to the fact that people already have one. This not only reduces waste, but also reduces packaging and transportation costs. Furthermore, an interface for charging and data transmission can simplify various operations, which is also a good thing for users.

Micro USB connectors are smaller than standard USB and Mini USB connectors, save space, have a plug and unplug life and strength of up to 10000 times, and have a blind plug structure design. The Micro USB standard supports the current OTG function of USB, which allows for direct data transfer between portable devices without a host (such as a personal computer). It is compatible with USB 1.1 (low speed: 1.5Mb/s, full speed: 12Mb/s) and USB 2.0 (high speed: 480Mb/s), while providing data transfer and charging, making it particularly suitable for high-speed (HS) or higher data transfer rates, It is the best choice for connecting small devices such as mobile phones, PDAs, digital cameras, digital camcorders, and portable digital players. At the same time, it can also provide convenience for the car, only requiring a USB car charger and a MICRO USB data cable for emergency phone charging. And in high-end cars, there is a 5V output interface directly connected to a MICRO USB cable to charge the phone. MICRO USB is versatile and easy to use.

On Android flagship phones, the USB Type-C interface has gradually replaced the MicroUSB interface. It is undeniable that MicroUSB remains the most widely used interface in digital products such as smartphones, power banks, speakers, Bluetooth headphones, cameras, and dash recorders.

A typical MicroUSB 2.0 cable has 4 pins, each defined as follows, where Vbus and GND are used for power transmission, and Data+and Data - are used for data transmission. The maximum carrying current of MicroUSB within the safe range is 2A, and the MicroUSB cable has been specially designed with additional contacts for overcurrent to ensure safety.