SEN0575 :: cable length, connector type and Gravity PCB height

Hi,

does anybody have an idea what type of connector is used on the Rain Sensor's cable? It looks like RJ11 or RJ12? I can't find this information anywhere. According to the principle how the sensor works I don't see any problems of extending the cable or did I miss something? What is the original length of the cable by the way?
I'm also searching for the information about height of the Gravity PCB (including PCB thickness). I can find information about width and length only:
https://dfimg.dfrobot.com/nobody/wiki/d54a40247ec60c65a98c5a73a633a623.pdf

Thanks.