Feature: 1. Fine Workmanship: With silver plated contact, eco friendly matte finish, and stable performance, this automatic Morse code keyer is finely crafted. 2. Strong And Durable: Made of premium board material, equipped with original rubber anti skid strip, this CW keyer is durable for long lasting stable use. 3. 3.5mm Output: Featuring a 3.5mm dual channel output interface, this Morse code keyer provides stable and reliable connection for easy installation. 4. High Sensitivity: Compact and lightweight, this automatic paddle keyer offers high sensitivity and reliability, perfect for radio experiment enthusiasts. 5. Ideal Experiment Tool: Ideal for radio experiment enthusiasts to conduct CW Morse code or shortwave radio communication experiments, this CW keyer is a great tool. Specification: Item Type: Auto Morse Code Key Material: ABS Size: Approx. 77 x 64 x 38mm / 3.03 x 2.52 x 1.50in Output Interface: Approx. 3.5mm / 0.14in . Package List: 1 x Auto Morse Code Key