Purchased from Amazon. Product Details ① KeeYees FTDI FT232RL USB-TTL Serial Converter Adapter Module 5V/3.3V Switchable with Dedicated USB Cable Compatible Devices: Laptop Connector Type: Mini USB Brand: KeeYees Item Weight: 0.06 kilograms Number of Ports: 2 Power Plug Type: No plug Pin Definitions: DTR, RXD, TXD, VCC, CTS, GND. RXD - Transmit Data, TXD - Receive Data. 3.3V/5V Support: Easily switchable by changing the jumper pin on the board. Overcurrent Protection: With a 500MA fuse, protecting the USB power supply and the device. Ideal for writing to Pro Mini and various control modules. USB connector pre-installed, comes with a dedicated USB cable and jumper wires, ready to use. ② KKHMF 120PCS Breadboard Jumper Wires (Female-Male) (10cm) Length: 10CM; Pitch: 2.54mm High-quality rubber casing, copper-plated. Used for prototyping in stepper motors, 3D printers, etc. These combinations provide jumpers to meet your needs. [Popular Limited Product]: Jumper cables that can be used for various electronic work applications. Can be connected to GPIO terminals. [Wide Range of Applications]: Various prototypes such as college students/engineers/technicians/factories/DIY experiments/electronic projects/breadboards/PC motherboards/PCB projects. [Package Contents]: 2 pieces of 40P*10CM female-male jumpers.