1、EASY OPERATION: Users can realize all the functions of automatic shooting CW by touching the ball with double fingers, which is convenient and reliable. 2、2 LAYER DESIGN: The upper layer is the main circuit and interface of the telegraph key, the lower layer is the magnet fixing base, with a stable structure. 3、WIDE APPLICATION: The key can be easily attached to radio casing, car cover and other iron objects without moving, and has a wide range of applications. 4、DURABLE MATERIAL: Using PCB circuit and 304 stainless steel shell, rustproof and corrosion resistance, which has good stability, convenient for outdoor use. 5、SENSITIVE TYPE: The automatic telegraph key is touch sensitive and has standard 3.5mm output interface, with stable performance and less interference. Item Type: Telegraph Key Material: PCB, 304 Stainless Steel Basic Parameters: Output Interface: 3.5mm interface Operating Environment: -40℃ to 85℃ 1 x Telegraph Key