Can't find dats sheets

I purchased this product from robot shop:
robotshop.com/ultrasonic-range-finder-15cm-6000cm-4.html

The part didn’t come with any data sheets or any other specifications. I don’t understand what the pins on this part mean and so I am unable to use it in my project.

Can someone please tell me where I can find the data sheets associated with this product.

Thanks!

The manufacturer sent the following links to the datasheets:
robot-electronics.co.uk/htm/srf02tech.htm
robot-electronics.co.uk/htm/srf02techI2C.htm
robot-electronics.co.uk/htm/srf02techSer.htm

We have contacted the manufacturer and asked for the specifications you requested. We will get back to you as soon as we get a reply.

Please let us know if we can assist you any further in the meantime.