1. Support +12V control voltage to achieve remote antenna switching without manual operation, especially suitable for antenna installation in hard-to-reach locations such as roofs and towers. 2. Support 4 antenna inputs, which can be switched to 1 radio device to meet multi-band and multi-directional communication needs and improve communication flexibility. 3. Support 500w continuous power, suitable for high-power transmission scenarios such as radio stations and amateur radio. 4. Adopt low-loss technology to ensure maximum signal transmission efficiency, reduce power waste and improve communication quality. 5. Adopt high-quality materials and precision design to ensure the stability and durability of the equipment under high power and long-term operation. Equipped with SO-239 standard RF connector, compatible with common coaxial cables, simple and quick installation. Product parameters Number of antenna inputs: 4 Number of outputs: 1 (connected to radio equipment) Frequency range: 1.8-60MHz Impedance: 50 ohm Power: 500W PEP Control voltage: +12V Connector type: SO-239 Dimensions: 10x11.5x3.5CM Colour:Black Material:ABS Package Contents: 2 x AT14 Switcher 2 x Controller KIT