Our 3rd generation tilt compensated compass, better than ever and now with a 3-axis gyro and kalman sensor fusion built in.

Full Technical Data, and the Compass FAQ

Voltage - 3.6v-5v
Current - 35mA Typ.
Resolution - 0.1 Degree
Accuracy - Better than 2%. after calibration
Signal levels - 3.3v, 5v tolerant
I2C mode - up to 100khz
Serial mode - 9600, 19200, 38400 baud