KAD-2BT Bluetooth Amplifier Dont be fooled by the KAD-2BTs size,this compact unit is LOUD (delivering up to 55 watts per channel), packed with features and is incredible value at this price. Offering you not only Bluetooth connectivity for your Smartphone or Tablet, it can also be used with up to two microphones (with echo,tone and mic volume controls), and has the ability to playback from either SD card or USB stick.In addition there is a built in FM Radio Tuner and two RCA inputs for connecting a CD player or other external device. Mic volume, tone and echo effects are adjustable through rotary controls. Master Volume, Treble and Bass rotaries control tone and overall output. Perfect for both domestic and commercial use. Ceiling Mount Speakers These quality water resistant speakers are perfect for panel and ceiling mounting. Providing audio installation applications such as bars, cafes, swimming pool areas, bathrooms and more. Zone Switch Console (4 Way) This compact switch allows the connection of up to 4 pairs of speakers to an amplifier, with the ability to select each pair individually or all together. This can be a quick solution for the zoning of a sound. For connecting up to 4 pairs of speakers (4-8 Ohms) in any combination to 1 stereo amplifier output With built-in power protective resistors Designed for 4-8 Ohms Speakers