This Shure BLX4 Wireless Receiver is perfect for small venues and conference rooms. It has a single-channel, portable tabletop design. The dimensions are 7.4 x 1.6 x 4.1' / 188 x 40 x 103 mm and it weighs 2.55 lb. It comes with 123 auto-scan frequencies, internal antenna diversity, and can be expanded to 12 mic channels with a 300' range. Setup is easy with group and channel scan. The receiver type is tabletop, it has 2 internal fixed antennas, 1 audio channel, and various audio I/O options. It operates within a temperature range of 0 to 135°F / -17 to 57°C.