Description: 【Premium Material】: Cw Training is made from PCB material, ensuring high performance and long service life 【Easy Installation】: Plug and play 【CW Training】: This training has two working modes, which can be used on computers and phones for CW training, adapting to various systems 【High Performance】: The Code Training has high performance and reliability 【With Indicator】: Indicate the working mode. The indicator is always on in mode 1, and the indicator flashes in mode 2 Specification:Type C Interface: If you want to use this training on a phone, you need to prepare a double Type C Interface data cable. If you want to use it on a computer, you need to prepare a phone charging cable with 1 USB port and 1 Type C Interface. Size Chart:Type C Interface: 3.3cmx1.5cm/1.30inchx0.59inch Package Includes: 1 CW Training Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.