Optional Mount with KnobsThis optional bracket is used for the NavNet TZtouch2 TZTL12F, when you want to mount the unit to a flat top. This mount allows you to adjust the angle of the unit for the optimum viewing angle. Two knobs are included with this bracket.Compatible Devices:NavNet TZtouch2 TZTL12FWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.