Aluminum and glass Custom-designed three-inch drivers Powerful DSP chip to deliver studio-quality sound All speakers have Bluetooth 5.0 connection Two speakers can be connected with true wireless and played simultaneously Multiple devices can be connected with the Wi-Fi module Amplifier: Class D built-in (active) Output power: 2 x 15 W Frequency Response: 60 Hz - 20 kHz ±3 dB on axis Dimensions: H 105.51" x W 79.92" x D 37.40" Weight: 7.27 lbs