Fangrui Product Details 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 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