Features: 1. LCD1602 display screen, large screen display 2. Newly added Type-C 5V and 3.7V lithium battery power supply, suitable for outdoor use with charging capability 3. Functions as a decoder for practicing Morse code, effectively decoding CW input signals 4. Red button enables or disables space character recognition during decoding 5. Onboard LED indicators, two lights illuminate when fully charged Parameters: - Display screen: LCD1602 - Power supply: DC 5-12V/500mA or 3.7V lithium battery - Includes Type-C port for 5V and 3.7V lithium battery charging Product Description: This device serves as a Morse code practice decoder, capable of decoding CW input signals. Connect a Morse key to the CWKEY socket to input your own code and view the decoded output on the screen. The 103 potentiometer adjusts CW signal sensitivity, while the 102 potentiometer controls LCD contrast. The red button toggles space character recognition on or off. Two onboard LEDs light up when the battery is fully charged. Note: When using Type-C power, toggle the switch if the screen flickers. Material: PC + Metal Color: As shown Package Contents: 1 x Decoder module (appearance may vary slightly due to different production batches, does not affect functionality) No additional items included Note: Lighting and display differences may cause slight color variations between the image and actual product. Measurement tolerance: +/- 1-3 cm.