【SIMPLE OPERATION】This telegraph straight key comes with a buzzer, which has voice prompts during practice to ensure better practice, and allow for simple operation. 【WIDELY COMPATIBLE】This morse code equipment tool's data cable can connect the telegraph key to most CW transceivers and transmitters for practical use. Meet your different needs. 【EASY TO INSTALL】You can easily remove the morse code key from the Morse code trainer, and the installation is also very convenient. It can be used for beginners to learn or perform. 【PREMIUM QUALITY】This morse code CW keyer is basic but perfect in workmanship. Adopting premium ABS and iron material, the telegraph practice tool is very durable. 【100% QUALITY ASSURANCE】We are very confident in the quality of this morse code trainer, and provide warranty or refund for it. Please feel free to reach us if you have any questions.