This is a very interesting module that can be used as a small transmitter or in a transmitter reciever combination, it could also make a small repeater specs are as follows
Frequency Range
Test Supply voltage+5v
Range pin 'high' (open circuit) - output range approx 400-430 MHZ (tune volts +5v)
Range pin 'low' (ground) Output range approx 453-480 MHZ (tune volts +5v)
The tuning capacitors accessible from the top cover have a range of approx +/- 15 MHZ
The modulation input only works with the high frequency (transmit) oscillator
Pinouts left to right (4 in a line at the bottom)
Top left output, bottom left 5v then high/low selection then 0v then modulation input lastly top right vco tuning.
On the top are two trimmers to trim the lower or higher bands approx plus or minus 15 MHz so very useful for ham bands
Interesting nights project