• 4 channel Bluetooth amplifiers:The amplifier lets you pair 4 speakers for a powerful sound. 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 Desgin：Compact 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. 
• Dimensions: Total Speaker Diameter: 6.4 Inch Cut Out Diameter: 5.7 Inches Total Speaker Depth: 2.6 Inches Mounting Depth: 2.6 Inches