This product is only suitable for campus broadcasting and rural broadcasting systems. Input power: 1-5W Transmission frequency: 87-108MHZ Working mode: FM frequency modulation Output power: 50-300W Clutter suppression.2 Load impedance: 50 coaxial Power supply voltage: 220V Standby current: 200mA Cooling method: temperature controlled air cooling Minimum size: 308mm260mm90mm. High-grade aluminum alloy chassis -Stable work and long service life -With standing wave protection function -220V power supply. 1 x Power Amplifier Note: -Please use an antenna corresponding to the transmitting frequency, standing wave within 2.0, and withstand power above 400W. Do not touch the antenna in the transmitting state. Do not use in explosive environment gas station, natural gas, etc. Please follow the national laws and regulations and the local radio management department to use. Usually it cost about 35USD-50USD. If you receive defective item, please kindly notify us within 14 days. The item "FM Power Amplifier Solid-state Audio Amp 87-108MHZ for Rural Campus Broadcasting" is in sale since Monday, September 21, 2020. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers". The seller is "ilotoanalyzer" and is located in Shenzhen. This item can be shipped worldwide.