2-way speaker set. Set includes 1 active and 3 passive speakers. Class D amplifier with Bluetooth 5.0 receiver (enhanced speed and range). Magnetic steel grille. Anti-theft construction. 2-way coaxial speakers. Includes speaker cables. The NCBT series is a range of flat ceiling speakers featuring a quick-mount system for easy installation. These high-quality 2-way speaker sets are equipped with a flush-mounted metal grille (with magnetic closure) and a Bluetooth receiver for wireless streaming of your music to the speakers. Ideal for use in your living room, on the porch, in the garage, in the showroom, in restaurants, etc.