Features: 1. LCD1602 display screen, large screen display 2. Newly added TYPC-C 5V 3.7V lithium battery power supply, suitable for outdoor convenience and simplicity with charging function 3. As a decoder for practicing Morse code, it performs well and checks its decoding ability when listening to CW input sources. 4. The red button will turn on or off space character recognition for decoding or not decoding space characters on the screen. 5. On board LED lights, two LEDs light up when fully Parameters: Display screen: LCD1602 display screen Power supply: DC5-12V/500mA Power supply: 3.7V lithium battery power supply Newly added TYPC-5V 3.7V lithium battery power supply, suitable for outdoor convenience and simplicity with charging function Product Description: As a decoder for practicing Morse code, it performs well and checks its decoding ability when listening to CW input sources. Insert the Morse key into the CWKEY socket to decode your own code, and view the CW decoding as a test on the screen during practice. The 103 potentiometer will adjust the sensitivity of CW signal recognition, while the 102 potentiometer will adjust the LCD contrast. The red button will turn on or off space character recognition for decoding or not decoding space characters on the screen. Fully , two LEDs light up Attention: When using TYPE-C power supply, please toggle the switch when the screen flashes. Material: PC+Metal colour: As Shown Package Contents: 1 x decoder module(Due to different product batches, the appearance may be different, which does not affect use.) 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.