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 RF Audio Power Amp 87-108MHZ for Broadcasting tps" is in sale since Friday, September 11, 2020. This item is in the category "Business & Industrial\Test, Measurement & Inspection\Signal Sources & Conditioning\RF & Microwave Amplifiers". The seller is "topskyrc" and is located in Shenzhen. This item can be shipped worldwide.