Universal C to A OTG adapter has a good connect interface for your existing USB C Laptops, Tablets, or Smartphones. it is meant to connect a USB-C with a USB A end to a standard USB C port on your M-a-c-book 2021/2020/2019/2018/2017, Chom-e-book, Mate-book, i-Pad, Sa-m-sung Ga-laxy, etc. USB C port to USB 3.0 converter up to 3 Amp of output current and data transfer speed of 5Gbps. The ultra-slim design ensures theres space to plug two adaptors side by side into your MacBook Pros USB-C ports. The male USBC and female USB3 connectors are designed to be plugged and unplugged up to 10000 times. We promised 12 Month warranty -- Refund/Replace. The package includes 4 pieces of USB-C to USB 3.0 adapters, which allows using those type C adapters on your multiple devices.