These high power music speakers with built-in amplifier and BT feature a 2-way bass reflex speaker system with a 5,25” long throw woofer and a silk dome tweeter. Easily adjust the speaker's volume level from your phone, tablet or other BT enabled device. The DS50 series is also equipped with a unique standby / Auto power On System. It sets the amplifier to standby mode when the unit has not detected any sound signal for the specified time and turns it back on when you begin playing music.  Suitable for free-standing or wall mounting using the enclosed adjustable mounting brackets. The trapezoidal design allows for the enclosures to be mounted neatly in corners, making them ideal for Background music, Hi-fi and surround sound applications. Set consists of 2 speakers (Active + Passive) Built-in class-D stereo amplifier 2-Way Bass reflex speakers with crossover filter Using BT wireless technology for audio streaming Bass Response System Aux (3.5mm) Input Jack (Loop + Sub) Volume, Bass, Treble Adjustment Metal Speaker Grilles Including mounting brackets and power cable