NOTE: These are two 528 passive speakers.
Model: HCS 528
Speaker Size: 5.25 inches
Max Power: 300 Watts
Power Output: 150W
Max Sensitivity: 89 dB
Impedance: 8 Ohms
Frequency Response: 60-20 kHz
Total Speaker Diameter: 8.46 Inches （21.5CM）
Cut-Out Diameter: 7.3 Inches （18.5CM）
Speaker Depth: 4.33 Inches （11CM）
2* Ceiling Speaker
2* Speaker Cable
Powerful Bass & Coaxial Tweeter
The tweeter produces rich detail and clarity, projecting a solid and focused image for all sources, which means the tweeter can be aimed at a spacious sound field.
Paintable & Removable Grille
The built-in circular anti-fouling speaker grille matches the existing embedded design in your home or workplace to obtain a clean appearance and achieve a wide range of sound performance.
Flush Wall Speakers & Easy Installation
Compact embedded installation design, can be easily installed in the wall/ceiling or pre-cut speaker opening.
Sorry,The TWS function just used for bluetooth function.
While you can't directly control this hardware via Alexa, you could get a BT pairing with an Amazon Echo device, and listen to the music you command by speaking to Alexa. Correct?