The -25 encoder is used, which has a long service life and a better handle. Added FM amplifier and M filter. Use the knob cap of -25. Added TYPE-C socket Support audio output Support 3.5mm headphones Use 3.6v lithium battery USB charging Support 8 ohm speaker 1w FM output supports headphone antenna Use BNC antenna interface The pcb retains the si4735 package, the user can replace the chip by himself, and the software is compatible Features of this sketch: 1) fm, am (MW and SW) and SB (LSB and USB); 2) 0.5, 1, 1.2, 2.2, 3 and 4khz audio bandwidth filters; 3) 22 pre-configured commercial radio and ham bands; 4) BFO control; and 5) Frequency step switch (at 1, 5 and 10kHz); Type: Radio Receiver Colour:black Material:Metal Package Contents: 1 x receiver 1 x antenna 1 x data cable 1 x mirror cloth 1 x Corner pad 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.