The finished board and spare parts include a cooling plate but do not include a cooling fan. A cooling fan is recommended for daily use. HF power amplifier board for HF SSB and CW mode power amplification. Frequency range: 3-28MHz Input power: 0.1-3W Output power: 30W (7MHz) at 13.8V; approximately 15W when driven by 0.2W, approximately 30W when driven by 2.5W Operating voltage: DC 12-13.8V Working current: up to 6A maximum Switchover mode: Automatic Model: B Power Interface Universal Pad Finished Board Color: Green Material: ABS Package Contents: 1 x Amplifier Board Note: The package includes only the items listed above. Other products are not included. Note: Light reflection and differences in display screens may cause the color of the item in the image to vary slightly from the actual product. Measurement error allowance is +/- 1-3cm.