This FM stereo transmitter can be used for factories, schools, supermarkets, farms, Office space or create your own radio station. 
CZE-7C using advanced modulation system and built-in PLL frequency, audio pre-emphasis, limiter, and low-pass filter circuit.
The Control circuit board design and amplifier design to reduce noise, so sound quality is even better.
Well-shielded, compact structure, small size, generous appearance, plug and play, very easy to use.

Phase Lock Loop (PLL) System

Easily choose your frequency LCD and buttons

Freq range :88MHz~108MHz

RF output impedance: 50 Ohm (TNC Type antenna output)

RF output power:1.5W/7W (Power can be switched) 

Reference range: 5 Km - 10Km (A barrier-free environment) 

Ripple or harmonic waves: <= -60dB

SNR: More than 60dB 

Tuning Step : 100khz

Stability of Frequency: ±5ppm Less than 10ppm ( better system)

Freq. Response: -55dB(100~5000Hz); -45dB(5000 ~ 15000Hz )

Audio Input Connector: 3.5mm headphone connector

Microphone jack; it can be connected wih the microphone

Stereo channels crosstalk: -50dB 

Audio frequency response: 20 to 15000Hz 

Audio distortion: Less than 2% 

Modulation: 15% 

Power supply voltage: DC 10-14V (12V recommended)

Operating current: Less than 2A 

Unit dimensions: 128mm(L) * 93mm(W) * 55mm(H)

* Connect antenna first ,then connect the power supply, otherwise, transmitter will be burned out.

* Select an unused FM station in your area. 

* Setup steps: 1, hold down power button then connect to power supply. the LCD screen will display H(7W) or L(1W), press "+" or "-" to switch it.  2, press power button to set frequency upper limit and lower limit.  3, restart fm transmitter.

CZE-7C 7W FM Transmitter TNC connector x1