The Contacta STS–S61–G is a Flush Mount Loudspeaker (Grey), included within the STS-K003L-B kit. This item can be purchased as a replacement for a damaged or defective unit but has also been succesfully used in Speech Transfer scenarios that require a discrete, robust, small loudspeaker for localised voice reinforcement or audio broadcast.

The loudspeaker unit is a compact solution that includes a 4Ω, 5W (RMS) loudspeaker delivering 85dB at 1W/1M. Dimensions are approximately 50mm (D) x 60mm (W) x 120mm (H).