http://store.open-electronics.org/Breakout/UltraSonic%20Ranger
!!! OMG !!!
5 or more 20.43€ rip off..
http://www.ebay.com.au/itm/New-Measuring-Transducer-Ultrasonic-Module-HC-SR04-Distance-Sensor-For-Arduino-/110845633157?pt=AU_B_I_Electrical_Test_Equipment&hash=item19ceea2285
cost for just 1 and free shipping $2.39 (not 20.43 Euros)! 5pcs would be cheaper still.. who shops at this site?