The Oracle 2s design is based on all the customer feedback we got from the original Oracle and includes: Improved Auto-Brightness Detection, Improved Manual Brightness Control (lower levels), Improved Set-Up (micro-adjustments on LRF), better waterproofing and more accurate arrow drop calculations. The function is still the same... range your target at full draw with the push of a button. The Oracle 2 instantly provides the distance to your target and an exact aiming point that factors in the angle of your shot.