Great part!

I run the part at a Pic of Microchip ... It can be used super, work very precisely and is extremely comfortable even with respect to the supply voltage: Even with below 4V, it was exactly as it should.

The opinion of my Vorrezensenten I have to disagree in 2 points:
1) It must be used simpelst. One has on a pin only 10us a HI can settle and by a pin to read - done.
2.) You do not need 2 pins on his .mu.C sacrifice: Simple Trigger and Echo about 2K Ohm connect and hang .mu.C to trigger - and voila, you have only one pin full operability.

If you consider how much cost a US receiver and transmitter at other stores - here gets the entire part by less than elsewhere the items.

From me a strong buy recommendation!