Features: Output power continuously adjustable from 0.3W to 15W. Constant power, the whole band has 3 to 5W margin. Output power automatic locking. Microphone with reverb and can be turned on or off. Channel is Optional: Single/Dual. PC control port, computer manipulation through software, more advanced. Audio digital-analog conversion, easier digital input. VSWR protection: if the antenna is not connected correctly, there will be automatic access for protection. Temperature protection, automatic protection when the transmitter temperature is too high. Fan with temperature control switch, automatic ON/OFF. Host panel with a number of shortcut keys, intuitive display, simple operation, fast. The equipment with reasonable design, material quality is very high, rugged. Technical Specifications: Operating Voltage: DC12V-16V (Rated voltage15V). Maximum Operating Current: less than 3A. Frequency Range: 87MHz-108MHz. Frequency stability: +-10PPM. Frequency step: 100KHz. Operating Temperature Range: -10-45 Degree Celsius. Output power: 0.3W-15W (continuously adjustable). Output Impedance: 50ohm. Maximum Deviation: +-75KHz. Harmonics, spurious radiation =< -60dB. Audio Frequency Response: 50Hz-15kHz. Audio Input Level: 15dBV (adjustable). Audio Input Interface: 3.5mm headphone connector. MIC input: 3.5mm headphone connector. Separation: >=35dB SNR: >=60dB Reference for the distance: 10 to 18Km (barrier free environment). Size: 173mm x 110mm x 48mm. GP2 1/4 WAVE aluminum outdoor antenna: Gain: Omni-directional 3dB. Impedance: 50 ohms. Frequency: default 90MHz (88-108MHz frequency modulation according to user needs). Bandwidth: In the standing wave within 1.5 to greater than 5MHz. The center of the standing wave: less than 1.1. Antenna connector: TNC connector. Maximum Power: 15W. Angle: the vertical direction of the radiation angle is 45 degrees. Note: Connect antenna first, then connect the power supply, otherwise, transmitter will be burned out. Select an unused FM station in your area. Packing included: Type A: NKTECH CZE-15B 0.3-15W FM Transmitter (It's only a transmitter). Type B: 1 x NKTECH CZE-15B 0.3-15W FM Transmitter-TNC Port. 1 x Pro GP TNC Aluminum Outdoor Antenna. 1 x 12V 4A Power Supply. 1 x Conversion Socket. 1 x Audio Cable. Details Pictures: 
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