The TRN BT20S Pro is a Bluetooth module with a USB Type-C charging port. It uses 0.75mm Pin connectors. I am selling it because I no longer use it. There is some paint chipping on the USB port, but there are no issues with its operation. - Model Name: BT20S Pro - Brand: TRN - Charging Port: USB Type-C - Connector: 0.75mm Pin Thank you for looking.