Hikvision DS-KD-ACW3/S Mounting Bracket surface-mounted frame 3 Stainless Steel Specifications DS-KD-ACW3/S Stainless steel design Application: surface-mounted intercom Operating temperature: -40° C to +60° C (-40° F to 140° F) Dimensions: Cover: 320.8 x 107 × 4 mm (12.6" x 4.21" x 0.16") Installation Frame: 320.8 x 107 × 32.7 mm (12.6" x 4.21" x 1.29") Operating humidity: 10% to 95% Material: Cover: Aviation Aluminum, Gang box: Aviation Aluminum