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

Bluetooth home ceiling speaker 4" 20w built-in class d digital amplifier, school closed sound speaker indoor theater sound system2pcs/set: 1 bluetooth + 1 passive ceiling speaker:▪ Speaker unit: combination 4 "" Coaxial unit▪ Power: 2x20w▪ Maximum power: 2x40w▪ 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: ▪ S/n: what? > 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: ▪ S/n: what? > 78 db▪ Decorative material: abs▪ Installation: ceiling mounted▪ Opening hole size: ☑ 152 mm▪ Product size: ☑ 175 x 75 mm▪ 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. Please note that the bluetooth name is surpass, the password is 1688. if you don't want to pair the password or want to connect the bluetooth tv, smart voice assistant and other devices via bluetooth. please contact customer service for replacement before placing an order.3. We can customize your bluetooth name and password according to your needs. the password must use 4 digits (except 0000). if you need to modify it, please make a note after placing your pre-order or contact customer service, otherwise we will send it according to the default bluetooth name and password.4. 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 meters.5. Please measure the ceiling height carefully before placing an order.Package includes:Ceiling speaker x1/2/4Power supply x1Speaker cable (optional)