Features: Experience unparalleled portability with the Morse Code Practice Oscillator, smaller and thin, making it for any enthusiasts toolkit or pocket. Equipped with TYPE C interfaces, this device can power by various sources like phone charger, laptop adapters, power sources, or computers, ensuring seamlessly operations in any environment. For both beginners and operators, this practice oscillator aids in masterings Morse code rhythm through auditory and visual, enhancing learning and correcting techniques errors. Perfect for use in diverses setting, whether indoors or outdoors, this device fit effortlessly into any space where a Morse key is used, offering flexibility and convenience. The Morse Trainer supports vertical, horizontal, and semi Automatic key, accommodating all manual Morse key without compromises, making it essential tool for anyone passionate about CW communication. Specifications: Component:Plastic Size:Approx.35x17mm/1.38x0.67inch Package Includes: 1pc USB C Key Trainer note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.