Note:The parcel haven't including power supply.Please purchase local DC12V3A( DC12V4A can also ) power supply and power socket 2.1
You can buy it from my shop. The package will be shipped from China and the delivery time is about 12 days,If you use express shipping service, the delivery time is about 7 days

Power supply: https://www.ebay.com/itm/184365151672

Power input interface DC2.1
Power supply voltage: DC-12V3A OR  DC12V4A
Frequency range: 76~ 108Mhz
Frequency Step value: 100kHz
Frequency stabilization way: PLL
Frequency stability: ± 10 ppm (-10 ° C +60 ° C )
Frequency Modulation: ≤ ± 75kHz (100%)
Work methods: continuous work
Clutter and Harmonic: less than-60dB
SNR: ≥ 60dB
Stereo separation:-50dB
Audio frequency response: 20 to 15000Hz
Audio distortion: <2%
Modulation: 15%
Input Level:-15dBV (adjustable)
RF output impedance: 50 Ohm
 RF output power: 1/7W (Two gear power can choose)You can easily switch between the two by using the instruction manual on the package
Unit dimensions: length of 180mm, 120mm width, and height of 45mm
ATTENTION: Never power on the transmitter for a long time when an antenna is not connected.

Packing included:
1XST-7C 7W FM Transmitter 
1Xsmall antenna