. 4.5 full-range speaker unit . Engineered for optimum BGM reproduction . The low-profile design facilitates installation in limited ceiling spaces . Direct support for low-impedance or high-impedance connections . Built-in carrying band increases safety during installation . Double-threaded speaker clamp screws for speedy tightening . Paintable grilles with magnetic catches . 3.1kg (6.8lbs), Ø324 x D143 mm (Ø12-13/16" x D5-11/16") . Anti-drop tab mechanism provide provides temporary positioning during the installation . Optional pendant-mount kit (PK-C4) and tile rail kit (AB-C2) are avaiable