The Sennheiser ew IEM G4-TWIN-A (article 509614) is a wireless in-ear monitoring set from the evolution wireless G4 series, letting two performers hear their own monitor mix on stage without floor wedges. The set comprises an SR IEM G4 half-rack stereo transmitter in a full-metal housing and two EK IEM G4 bodypack receivers, each supplied with IE 4 in-ear headphones, operating in the A range of 516 to 558 MHz. The transmitter has an OLED display, two electronically balanced XLR/6.3 mm jack combo inputs, and infrared sync to the receivers for quick setup. The system tunes up to 42 MHz of bandwidth with 1,680 selectable frequencies and up to 16 compatible channels, transmits up to 50 mW depending on local regulations, and has a range of up to 100 m. Signal-to-noise ratio is better than 90 dB. It can be managed with Sennheiser's Wireless Systems Manager software. The transmitter measures approximately 202 x 212 x 43 mm. Check South African ICASA frequency rules for the A band before deployment.