The Sennheiser SL MCR 2 DW-4 SpeechLine Multi-Channel Receiver is perfect for professional audio setups like conference rooms and houses of worship. It's available in 2- and 4-channel versions. With a sleek design, it can be mounted on walls, ceilings, or microphone stands. Weighing 650 g with the wall mount and 560 g without, it has dimensions of 180 x 180 x 45 mm (including wall mount). Operating temperature ranges from –10 °C to +45 °C (14 °F to 113 °F), and storage temperature from –20 °C to +70 °C (–4 °F to 158 °F), with a relative air humidity of max. 95%.