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 20 W RMS and 240 W peak power The matching transformer is mounted on the back In addition, this speaker has the tweeter to direct high frequency for optimal sound Note: This product is just a speaker, not a Bluetooth speaker Specifications: Colour: White Material: Metal, plastic Outer dimensions: 188 x 84 mm (Diameter x H) Cutout diameter: 163 mm Woofer diameter: 156 mm Peak power: 240 W Rated power (RMS): 20 W Input voltage: 70-120 V Sensitivity: 89 dB Includes tweeter Spring clip fastening With a transformer Delivery contains: 2 x Speaker