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@50Ω Output power: 40-50W Output impedance: 50Ω 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 Package Includes: 1x 50W Intelligent Portable Shortwave High-Frequency Power Amplifier note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.