Introduction:

The circuit trans frequency 88-108 MHz, using ordinary FM radio transmitter equipment.
Adjusting the inductance L to adjust the trans frequency to avoid the local radio frequency.
With DC 3V circuit operating voltage.

Parameter:

1.Model: RF-02FM
2.Operating Current: 5-15mA
3.Operating Voltage: DC 3-6V
4.Transmission Distance: 5-50m
5.Transmission Frequency: 88-108MHz
6.Audio Input: -15dB (max)
7.PCB Size: 53*40mm

Download the Instruction from HERE:
 

Diagram:

Finished Product: