The reverse micro USB cow horn mother seat material is as follows:

Note:
1.Material:
1.1 Housing: High temperature
    thermoplastic with g.f,UL94v-0
1.2 Contact: copper alloy,t=0.15mm
1.3 Shell: copper alloy&SUS
2.Specification:
2.1 Current rating: 1 A Max.
2.2 Dielectric withstanding 
    voltage: 100 V(ac) for 1 min.
2.3 Contact resistance: 30 mW Max.
2.4 Insulation resistance: 100 MW Min.
2.5 Total mating force: 3.57 Kgf Max.
2.6 Total unmating force: 1.0 Kgf Min.0.81~2.05 
    Kgf Min.after 10000 insertion/extration cycles
2.7 Temperature range: -30°C~80°C

Other specifications of reverse cow angle inner DIP1.8 (7.7-5.3) with an extension of 0.3, MICRO 5P B type reverse two pin SMT without column or curling edge, MICRO 5P B type reverse cow angle inner DIP7.7 (0.6x0.9) without column, MICRO 5P B type reverse cow angle inner DIP7.7x5.3 straight edge, and MICRO 5P B type reverse cow angle inner DIP8.35x4.45 straight edge.

Source of relevant mobile phone interfaces: On October 26, 2009, at the ITU ITU-T Fifth Research Group (SG5) plenary meeting held in Geneva, Switzerland, the framework standard for "Power Adapters and Chargers for General Mobile Terminals and Other ICT Devices" was discussed and approved, and an application was made for inclusion in the approval process. This actually means that the global standard for mobile phone chargers will be unified. It is estimated that the new standard charger can reduce energy consumption by half, and will reduce 51000 tons of waste generated by discarded chargers and 13.6 million tons of greenhouse gas emissions annually. Most importantly, we don't need to have two chargers at home and in the office anymore.

The universal charger interface standard officially implemented in China on June 14, 2007 specifies the overall structure of the charger and the interface on one side of the charger. It adopts the most widely used USB A interface, which can not only solve the problem of universal charger usage, but also enable mobile phones to easily connect to computers and achieve charging or data transmission. The essence of this standard requirement is to install a USB interface in the transformer, and the mobile phone charger is replaced by a micro USB data cable and a charger with a USB motherboard. The charger base can no longer be the standard configuration for mobile phones, just a USB data cable is required, or it can be charged directly from the PC interface. There are no relevant standard requirements for the interface on one side of the phone.

Experts say that since micro USB is equivalent to mini USB, it has advantages in terms of size, electrical characteristics, and plugging times. Therefore, the micro USB interface will become the mainstream. Our Telecommunications Terminal Testing Technology Association (TAF) conducted a selective study on mobile phone side interfaces in September 2007, and the micro USB interface has been included in the relevant pre-selected solutions.