Bluetooth speakers home ceiling speakers 20w 4-inch stereo sound system, built-in speakers indoor home theater sound system

Power source: ac Mailbox adapter: yes Cabinet material: plastic Audio crossover: two-way Waterproof: no Communication:aux Communication: bluetooth Communication: tws Speaker type: ceiling speaker Channel: 1 App support: no Battery: no Category:speakers Use: home Source: ************** Sound mode: other Voice control: no Power source: ac Number of speaker boxes: 4 Input power (w): 78 db▪ Decorative material: abs▪ Installation: ceiling mounted▪ Opening hole size: ☑ 152 mm▪ Product size: ☑ 175 x 75 mm▪ Weight: 1.9 kg.4pcs/set: 1 bluetooth + 3 passive ceiling speakers:▪ Speaker unit: combination 4 " Coaxial unit▪ Power: 4x20w▪ Maximum power: 4x40w▪ Resistance: 8hp▪ Sensitivity: 88db±3db▪ Frequency response: 60-22khz▪ Bluetooth version: 5.1, wireless transmission range more than 10 meters▪ Amplifier: class d digital power amplifier module▪ Non-linear distortion thd: Weight: 3.8 kg.Tips:1. Can be connected to the tv and let the tv sound play in the ceiling speakers at the aux connection terminal. with the audio cable, it cannot be directly connected to your tv by bluetooth if you the tv's bluetooth is only a one-way link.2. The master speaker must be connected to the slave speaker through a speaker cable. the newly added tws function can recognize the interconnection of two bluetooth master speakers. the distance across the glass is limited to 10 meters. if it is a thick wall, the distance is limited to 7-8 m