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https://www.rhaudiopa.com/video/rh-audio-active-bluetooth-ceiling-speaker.html

The RH-AUDIO Bluetooth ceiling speaker is ideal for streaming your music wireless to the speakers, which have three solutions chosen according to the size of the room.

Model RH31BL with 1CH solution 1*10W: 1 one-channel-amplified master speaker.
Model RH32BL with 2CH amplifier 2*10W: 1 two-channel-amplified master speaker and 1 passive slave speakers.
Model RH34BL with 4CH amplifier 4*10W: 1 four-channel-amplified master speaker and 3 passive slave speakers.

They are designed to enable high-quality audio streaming from any Bluetooth-enabled device and the wireless range is up to 10 meters. The installation requires only running 12VDC power to the amplified speaker, then running a single speaker cable to the passive speaker(s).

This active ceiling speakers has snap clamps for easy installation, retract the 2 snap clamps on the speaker into their open position. Then push the speaker up through the ceiling opening. When Clamp Arms press against the ceiling, the Snap Clamps will rotate and clamp down closed to the ceiling surface. When inserted correctly, both 2 snap clamps will be in the snap down position, thus securing the speaker securely into position in the ceiling.

The high-quality and easy fit-in ceiling Bluetooth speakers utilize 6W dual-cone dynamic speaker driver, will provide a clear and warm sound and suitable for installation in almost any material. Ideal for use in your living room, bedroom, hotel room, entertainment area, office, workspace, showroom, restaurant etc.

Amplified Bluetooth Ceiling Speaker includes features:
Built-in digital Class D amplifier.
Three options for power output.
Built-in Bluetooth for wireless music streaming - works with almost all Bluetooth devices(phones, Androids, smartphones, iPods, tablets, etc).
Support for Bluetooth protocols: HFPV1.5, A2DPV1.2, AVRCPV1.4, HSP1.2, GAVDP1.2, IOP
DC 12V power supply with AC adapter.
Full-range 6" dual-cone dynamic speaker driver.
Frame-mounted spring-loaded clamps provide secure,low-noise connections and easy installation.
Attractive color ABS resin finishes with white metal grille suits any decor.

RH-AUDIO was incorporated in the year 2006 and began his business of manufacturing commercial speaker system, providing applications of sound reproduction/reinforcement for a variety of venues such as conference halls,shopping malls,school auditoriums, churches, commercial buildings, industrial sites, gardens, or an entire outdoor complex, etc.