
Wireless Series Connection: This 4-channel Bluetooth amplifier enables you to pair 4 speakers for robust surround sound. It is straightforward and user-friendly. 100FT RANGE: Advanced Bluetooth 5.0 provides more stable and immediate pairing than 4.2 and earlier versions. It sustains a solid connection up to 100 ft unobstructed from your device. A 3.5mm auxiliary input jack is included for linking other devices. Flush Mount Design: Its compact flush mount design allows for simple, easy installation in-wall, in-ceiling, or into pre-cut speaker openings. It is suitable for in-home use, office, professional, or custom audio applications on any flat surface. Mounts on Ceilings: Total Speaker Diameter: 7.5" (19cm). Cut-Out Diameter: 6.3" (16cm). Total Speaker Depth: 3.15" (8cm). Mounting Depth: 3.15" (8cm). What's in the box: 6.5" speakers x 4, Speaker connection wires x 4, Amplifier box x 1, Power adapter x 1. Note: A screwdriver is not included with this product