Parameter: Kit Name: CW Morse Code Decoder Power supply: DC9V power supply Working voltage: 9V Working current: 33mA PCB size: 101x50mm Operating instructions: (1) Connect to DC9V power supply. (2) The cw audio input terminal is connected to Morse code audio, which can decode and convert Morse code audio into characters, and display them on the LCD screen. (3) The cw audio output terminal can output received Morse code audio and can be connected to speakers or headphones. (4) Adjust the receiving threshold potentiometer to match the LED flashing frequency with the sound heard. If not adjusted properly, the decoder cannot decode the audio (5) Press the self-locking switch to view the entered Morse code, it will not display when it pops up. (6) Press the touch switch to view the bitrate of the received Morse code. (7) The CWKEY end is connected to the keypad, allowing for Morse code practice. The Morse code entered by pressing the keys will be displayed on the LCD screen. (Cannot be input simultaneously with audio input, otherwise it will interfere with each other and cannot be decoded correctly) (8) Short press the keypad as a dot, long press the keypad as a swipe. (Long press the button for more than 360ms to mark, otherwise short press to mark) Color: As Shown Material: Plastic+Metal Package Contents: 1 x Morse Code Decoder Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.