Feature: 1. The product is made of stainless steel material, and the surface is electroplated to increase the service life 2. There is a cushion at the bottom to protect your desk and equipment from scratches, very practical 3. High temperature quenching heat treatment strengthens the overall hardness, making the product more comfortable to use 4. The new plug is detachable, which is convenient for players to replace, easy to operate 5. Morse code communication CW telegraph can be used as physical electricity experimental teaching aids Specification: Item Type: Morse Code CW Telegraph Material: Stainless steel Model: HY-K4 Package List: 1 x Base 1 x Spring 1 x Press Plate 1 x User Manual Note: Only for DIY Morse code beginners to learn and use.