Axis C1720. Speaker type: 2-way, Speaker placement: Ceiling-mountable, Pole, Internal memory: 1024 MB. Frequency range: 180 - 15500 Hz, Sound pressure level (max): 99 dB, Amplifier class: D. Product color: Black, White, Housing material: Aluminum, Plastic, Steel, Display type: LCD. Connectivity technology: Wired, Compatible memory cards: MicroSD (TransFlash), MicroSDHC, MicroSDXC. Power source type: PoE