1. This product is suitable for single sideband CW SSB mode power amplification in shortwave amateur radio stations. Amateurs and professionals can use it to achieve more efficient and accurate SSB CW mode signal transmission and reception tasks. 2. It has a high linearity and frequency response range, and can maintain low distortion and interference during signal transmission. 3. Adopting automatic transmission and reception mode switching, seamless switching can be achieved, with good stability and reliability. 4. The finished amplifier is equipped with heat dissipation fins, effectively solving the problem of heat generation during power amplification. 5. The entire board design is more compact and , bringing us a more convenient, efficient, stable, and reliable wireless communication experience. Working voltage: DC12-13.8V Working current: up to approximately 6A Power interface DC socket: 5.5X2.1 (positive inside and negative outside) Frequency range: 3-28MHz Input power: 0.1-3W Output power: 30W (7MHz) 13.8V, approximately 15W when pushed with 0.2W, and approximately 30W when pushed with Frog Song Kit 2.5W Switching method for sending and receiving: automatic The shortwave power amplifier board can only be used for single sideband CW and SSB mode power amplification in shortwave amateur radio stations and is not suitable for other purposes. Colour:As Shown Material:PC Package Contents: 1 x amplifier 4 x screw(Due to different product batches, the circuit board printing is slightly different, which does not affect the 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.