• Wireless Serise Connection Compatible with Bluetooth:TWS function lets you pair 4 speakers for a powerful true surround sound.(the HOST speaker and SUB speaker will automatically link with each other within 6 seconds after you turn on both, simple and easy to use)
• 100FT RANGE:Advanced 5.0 ensures more stable and instant pairing compared to 4.2 and lower; maintains a strong connection up to 100 ft unobstructed away from your device; 3.5mm aux in jack for connecting devices
• Flush Mount DesginCompact flush mount design for simple easy installation in-wall / in-ceiling , or pre-cut speaker openings, for in home use, office, professional, or custom audio applications on any flat surface.
• Mounts on Ceilings:Total Speakers Diameter 8.46 Inches (21.5 CM),Cut Out Diameter 7.3 Inches(18.5 CM),Speakers Depth: 4.33 Inches (11 CM)
• What's in the box:HCS528 speakers x 4 , Speaker Connection Wires x 4, Amplifier Box x 1,Power adapater X 1.