Yopeissn Morse Code Trainer CW Learner 3.5mmx2 3D-Printed Shell with 2.3-Inch LCD Screen for CW Input Practice

This version is equipped with dual 3.5mm external key interfaces, with one as input, supporting external direct keys (heavy keys), bug keys, or automatic keys (single or double paddle). (The old-fashioned heavy-duty cw key plug is 6.5mm and requires a conversion connector to be used); One is used as an output to connect to other devices such as radio stations. The front speaker has clear sound, the volume is linearly adjusted by the mechanical knob, and the pitch is digitally adjusted. There is also a headphone jack that allows for silent practice with headphones, which feels better. Powered by lithium batteries and integrated with a charging management chip, it can be used safely and with confidence. Equipped with Type-C USB charging port, supporting mobile phone charger charging. Using dual color cw key indicator lights to distinguish between beeps, the code can be played in a three in one sound, light, and character combination during listening training, making the practice more intuitive. Equipped with a 2.3-inch LCD screen, adjustable contrast, and white backlight with adjustable brightness, the image is large and clear.