These wall/ceiling built-in speakers are ideal for offices, conference rooms, medical parties, cafe, schools, bathrooms, sports halls, or even in outdoor area such as patio! These speakers can be connected to each other in a single line Features: You can easily attach to cavity ceilings or walls using tension springs The loudspeaker comes with a metal grille and plastic case which is simple, compact, solid and non-fading This set of 2 speakers is designed with 3-6W RMS and 120 W peak power The matching transformer is mounted on the back Note: This product is just a speaker, not a Bluetooth speaker Specifications: Colour: White Material: Metal, plastic Outer dimensions: 192 x 78 mm (Diameter x H) Cutout diameter: 168 mm Woofer diameter: 153 mm Peak power: 120 W Rated power (RMS): 3-6 W Input voltage: 70-120 V Sensitivity: 89 dB Spring clip fastening With a transformer Delivery contains: 2 x Speaker