The Optimizer Tetra features a mechanical rheostat, redesigned two stage, micro adjust windage unit, water resistant sight tapes and a silky smooth 2.1 of travel. The quiver friendly, wheel forward design fused to a sleek, rugged sight frame makes the Tetra ideal for bowhunters and 3D shooters worldwide. Full 2nd and 3rd axis adjustment and compatible with a full line of accessories.