PanaVise is a major manufacture of mobile electronics mounts for hands-free kits, GPS units, satellite radio receivers, mobile video screens, two-way radios, and mobile data terminals -- if it"s electronic and mobile, we can hold it The Panavise 809-AMP Standard AMPS Window Mount for all Panavise AMP compatible products. Rectangular AMPS pattern: 30mm x 38mm (1.181-Inch x 1.496-Inch) on center. Powerful suction pad attaches to any smooth, flat, non-porous surface including windshields and windows. Full range of motion under the electronics: 210 degree Tilt, 360 Turn & 360 Rotation. Ratcheted arm has 140 vertical motion; knob locks arm into place. Suction pad is 3.4 (86.4mm) in diameter. Overall length is approximately 4.5 (114.3mm). Recommended for electronics weighing up to 3 lbs. (1.4kg). All PanaVise Products are covered by a Limited Lifetime Warranty