Features: This product is a carefully designed for Vband connector, suitable for Vband websites, used with for Vband software! Stable performance! Easy to carry! This product is used with the website, supporting manual and automatic keystrokes! The key interface of this product is a 3.5mm diameter key interface! The key must be 3.5mm to use this product. Non-3.5mm key require a simple conversion connector or conversion cable. The for Vband website used by mobile phones requires buyers to prepare their own 0TG adapter or OTG cable! Computer version: supports manual and automatic keystroke automatic recognition. The computer installs the practice software Lakey, the default manual keystroke, and the keystroke type is modified when using automatic keystroke. Click the button Manual in the middle of the software page to select the key. Put the cursor in the Cw box to practice. The computer version can also be used on the for Vband website, but the setting options need to be modified. If you find it troublesome, you can purchase the for Vband version separately. Practice communication directly on the website without modifying the settings. Our series of trainers are all intelligent in identifying automatic keys and manual keys. The electric key must be connected to the trainer first, then to the computer, and no other operations are required. This series of trainers supports Windows, for iOS, for Android, and for Hongmeng systems, and are all -and-play. Specifications: Part name: CW trainer Color: Photo color Material: ABS Size: As shown in the picture Package contents: 1*for Vband electric key connector PC version electric key connector Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. 【MULTI-PLATFORM SUPPORT】 This Mobile Code Connector works seamlessly with Windows, , , and for Hongmeng systems for all-in-one functionality. 【EASY TO USE FOR PRACTICE】 for beginners and experienced users alike with support for both manual and automatic keystrokes. 【STABILITY YOU CAN COUNT ON】 Built to deliver consistent performance during your Morse code training sessions, enhancing learning efficiency. 【SIZING REMINDER】 Make sure to check that your key is 5mm; if not, a conversion connector or cable will be necessary. 【COMPACT AND PORTABLE】 The lightweight design makes it easy to take this connector with you wherever you need it.