World beating performance - the SRF01 employs our 2nd generation AutoTune technology which allows ranging all the way down to zero on a single transducer sonar. 

Power - 3.3v to 12v, 25mA Ranging. 11mA Standby. 55uA Sleep.
Range Industrial spec' - 18cm to 600cm (no calibration required). 
Range Hobby spec' - 0cm to 600cm (after auto-calibration). 
Frequency - 40KHz 
Communication - One Pin Serial Bus @ 9600 baud with up to 16 SRF01's connected to a single pin on your controller.
Units - Range reported in cm or inches. 
Weight - Very light weight, just 2.7gm

Supplied with Mounting Grommet.

Full Technical Data and the FAQ

We also have a Free 3D bracket design as picture depicts above (blue bracket).

Examples:
Arduino - using an I2C interface and LCD03/LCD05, and also a seperate example of the fake ranging mode
ATMEGA32 - reading the result and displaying on a LCD03/LCD05
PIC18F4410 - reading the result and displaying on a LCD03/LCD05
PIC24FJ16GA002 - reading the result and displaying on a LCD03/LCD05
Picaxe18x - one wire serial communication exampe
PicBasic PRO -  uses the PIC16F877
Raspberry Pi - reads software version and range in cm