Valcom V-1013B. System type: single speaker, Speaker placement: Celing-mountable, Wall-mountable, Driver size: 127 mm (5 "). RMS rated power: 1 W, Frequency range: 70 - 16000 Hz, Impedance: 45 Ом. Connectivity technology: Wired. Width: 147.3 mm, Depth: 223.5 mm, Height: 147.3 mm. Current: 0.05 A, DC input voltage: 24 V