Hign-concerned Chemical: None Size: HAM Radio amplifier Type: 5W FM Transmitter Model Number: PLL Stereo FM Transmitter : Electrical 1,+ phase-locked loop technology, the frequency is more stable, the frequency does not change with the environment andthe frequency drift. 2, without any control, for beginners to bring the fun of DIY. 3, the frequency can be adjusted continuously in the specified range. 4, with the microphone input interface, and can control themicrophone volume by digital potentiometer. 5, the audio input can adjust the volume by digital potentiometer. 6, the power can be adjusted continuously in 0.5W between themaximum power 7W. Parameters 1, the input voltage: 12V DC 2, the input current: 1.0A 3, the audio signal: the maximum input Vpp is less than 1V. 4, the microphone type: cylinder microphone or microphone! 5, output power: 0.5W-5W continuously adjustable! 6, the output impedance: 50 ohm 7, the working frequency: 76M-108MHz 8, step frequency: 0.1MHz 9, the distortion degree: 0.03% ~ 0.1% 10, the board: board size: 100 x 60mm emission Control panel: 60 x 36mm 11, the distance is more than 5KM (the premise is: open fieldemission) 12, stereo separation: more than 63dB Color: As Shown Material: PCB Package Contents: 1*12V 5W FM Transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.