Features: Large display screen: A 0.96 "or 1.3" display screen, clear and intuitived. High frequency power amplifier: As an intelligent shortwave high-frequency power amplifier, this product has an output power of 50W and provides strong signal gain. Multifunctional design: The product is equipped with a power/SWR meter and an LPF filter, which facilitates users to detect power and standing wavy ratio, and effectively filters out stray signals. Wide frequency ranges: The product operates at frequencies ranging from 3.5MHz to 28.5MHz, covering wide ranges of shortwave frequency bands to meet different communication needs. Intelligent control: The product has intelligent control function, which can automatically adjust power output and protections circuit to ensure stable working state. Specifications: Material: Metal+Plastic Type: PA50, PA50 Plus(optional) Micro PA50 Screen: 0.96-inch Micro PA50+ Screen: 1.3-inch Frequency range: 3.5MHz-28.5MHz Input power: 1-5W Input standing wavy: 2.0@50 Output power: 40-50W Output impedance: 50 Supply voltage: 8.5V-14.2V; 13.8V (typical value) Current consumption: 12A Operating temperature: 55 Functions: High speed automatic transceiver switching High speed automatic switching LPF filter Power and standing wavy display and protections Voltage display and protections Temperature display, temperature protections, intelligent heat dissipation Note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 1x 50W Intelligent Portable Shortwave High-Frequency Power Amplifier