Hand Key Oscillator With Adjustable Transmission Speed Automatic Key Exerciser Automatic Key Controller CW Trainer _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Hand Key Oscillator With Adjustable Transmission Speed Automatic Key Exerciser Automatic Key Controller CW Trainer Handheld Key Oscillator _x000D_ Feature: _x000D_ 1. Compact and Portable Design: The hand key oscillator is about the size of a standard eraser but thinner, making it exceptionally portable. It easily fits into pencil cases, backpacks, or pockets, allowing you to take your practice anywhere without adding bulk compared to QRP radios and keys. _x000D_ 2. Battery-Powered Convenience: This automatic key exerciser operates on a single CR2032 battery (not included), eliminating the need for external power sources. This feature enhances portability, allowing you to use it outdoors with your QRP radio without carrying extra power supplies. _x000D_ 3. Versatile Functionality: The automatic key controller offers endless possibilities for CW practice. It supports vertical hand keys, horizontal paddles, and various automatic keys, making it a versatile tool for mastering Morse code, regardless of your preferred operating style. _x000D_ 4. User-Friendly Setup: Easy to use, this CW trainer allows you to connect manual and automatic keys to their respective ports effortlessly. Switching between practice and keying modes is simple, making it accessible for both beginners and experienced operators. _x000D_ 5. Engaging Feedback Mechanism: When used as a CW keyer, this device features an audible buzzer and a blue LED light that flashes in rhythm with your keying. This dual feedback system helps beginners understand timing better while allowing experienced operators to visualize their unique Morse code style. _x000D_ _x000D_ _x000D_ _x000D_ Specification: _x000D_ Origin: Mainland China _x000D_ Compatible Audio & Video Equipment Style: Digital-to-Analog Converter (DAC) _x000D_ Power supply: 1*CR2032 button battery (not included, need to bring your own) _x000D_ Material: PC _x000D_ Product size: about 39.00x25.00x10.00mm _x000D_ Product size: 1.54x0.98x0.39inch _x000D_ _x000D_ _x000D_ _x000D_ Note: _x000D_ Due to different monitor settings and lighting conditions, the actual color of the item may vary slightly from the pictures. Thanks for your understanding! _x000D_ Please allow a 1-2 cm difference in measurements due to manual measuring._x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 1xHand Key Oscillator _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_