Easy Operation: This telegraph straight key includes a buzzer with voice prompts during practice to support effective learning and simple operation. Wide Compatibility: This Morse code key connects via data cable to most CW transceivers and transmitters for convenient use. Easy to Install: The Morse code key can be quickly attached to or detached from a Morse code trainer. Installation is straightforward, making it suitable for beginners and performers alike. Durable Construction: This CW Morse code key features high-quality ABS plastic and metal components for long-lasting performance. Product Name: CW Key Item Type: Morse Code Key Function: Manual CW Morse code key Features: 1. Switch selects output to radio equipment or direct sound generation. 2. Powered by two AA batteries (not included) to drive the buzzer. 3. Designed for learning and practical use. Color: Black Material: ABS + Metal Package Contents: 1 × CW Key 1 × 3.5 mm headphone cable Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.