Feature 1TOUCH SENSITIVE: Auto telegraph key is touch type, standard 3.5mm output interface, stable performance and less interference. 22 LAYER DESIGN: The upper layer is the main circuit and interface of telegraph key, and the lower layer is the magnet fixed base with solid structure. 3EASY TO OPERATE: Users can realize all functions of CW automatic shooting with two fingers touching the ball, which is convenient and reliable. 4PCB CIRCUIT: Telegraph key is printed with PCB circuit, rust resistant, good stability and convenient for outdoor use. 5WIDE APPLICATION: The key can be easily attached to iron objects such as radio shells and car hoods without moving, so it has a wide range of applications.Item Type:AutomaticTelegraphKeyMaterial: PCBVoltage: DC5VOutput Interface: 3.5mm InterfaceWorking Environment: -40 to 85 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x AutomaticTelegraphKey