1. Supports +12V control voltage for remote antenna switching without manual operation, ideal for antennas installed in hard-to-reach locations such as rooftops and towers. 2. Supports 4 antenna inputs that can be switched to 1 radio device, meeting multi-band and multi-directional communication requirements and enhancing communication flexibility. 3. Handles up to 500W of continuous power, suitable for high-power transmission applications including radio stations and amateur radio operations. 4. Utilizes low-loss technology to maximize signal transmission efficiency, reduce power loss, and improve overall communication performance. 5. Constructed with high-quality materials and precision engineering to ensure stability and durability during high-power and long-term operation. 6. Equipped with SO-239 standard RF connectors, compatible with common coaxial cables, enabling simple and quick installation. Product Specifications Number of antenna inputs: 4 Number of outputs: 1 (connects to radio equipment) Frequency range: 1.860 MHz Impedance: 50 ohms Power rating: 500W PEP Control voltage: +12V DC Connector type: SO-239 Dimensions: 10 x 11.5 x 3.5 cm Color: Black Material: ABS Package Contents 1 x AT14 Switcher 1 x Controller Kit Note: The package includes only the items listed above. Other accessories or devices shown are not included. Note: Lighting effects and monitor settings may cause slight variations in color between the product image and the actual item. Measurement tolerance is +/- 13 cm.