❊ Compatible with Bluetooth: Fast to pair for system with your most portable devices. Independent amplifier box and intense signal bring you superior sound effects. ❊Easy To Install: the thin grille is detachable, with mounting depth of 4.1", great fit to your ceiling, no hassle installation with included speaker connection wire, Controller & power supply. ❊Wide Application: A pair of flush mount design ceiling speaker for simple and easy in-wall / in-ceiling installation. Suitable for home use, office, professional, or custom audio applications on any flat surface. ❊High Durability - our ceiling speakers are made of durable and lasting ABS material, allow you to enjoy peak performance in high humidity environments and speaker performance covers the room with balanced sound,no drop-offs. ❊What’s in the box: 1 pair/ 2 in Ceiling speakers, 2 speaker cables, a power supply and an amplifier.