CW Morse Code Training Key Manual Telegraph Key with Sound & Light Feedback for Radio FM Telegram Radio Transmission Key Superior Materials: The base is hand-polished from rosewood, featuring a natural grain and dense texture; metal components are made of stainless steel and aluminum alloy, ensuring wear resistance and durability. Sound and Light Simulation Function: Built-in sound and light modules simulate telegraph sound and light, eliminating the need for additional learning equipment; practice can be done with a regular computer. Suitable for Multiple Scenarios: Supports manual and automatic telegraph keys; connects to a computer via USB for diverse Morse code learning and training with software such as LAKE. Precise Structural Design: Floating bearings and pure copper contacts ensure sensitive press response; anti-slip rubber feet provide stability and shock absorption, preventing wobbling. Suitable for Beginners and Experienced Users: Beginners can practice sound and light response; advanced users can use it as a real telegraph key. Comfortable to hold and durable for long-term use. External interface: 3.5mm, compatible with transmitter interface Battery: Button, 3.6V Color: As Shown Material: Wood+Metal Package Contents: 1*CW Morse Code 1*Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.