NKTECH CZE-T251 Adjustable 0~25W 87~108MHz FM Transmitter Mono/Stereo PLL Broadcast Station Single Knob Operation SWR & Temperature Protection Frequency range from 87 to 108MHz, Output Rower: 0~25W. Do not touch the antenna when transmitter powered. Mono/Stereo mode Optional, Power adjustable from 0 to 25 Watts. Single Knob operation, simple and convenient to use. It has VSWR protection, temperature protection, electronic volume adjusting, equipped with low pass filters.