Redback A2272 Australian Monitor It features a ball and

It features a ball and socket design with 360° swivel and 90° tilt capability

expandable to a maximum of 245 desk microphone units with additional Extension Units (CCSD

Redback A4597

Features Talk/Mute switch on base with LED status indication

the TOA ER2215W offers this feature

Redback A2272 Australian Monitor It features a ball andRedback A2272 Attenuator Volume Control 40W 100V Line Vert. Surface Mount Designed to control 100V line speaker systems these attenuators have been enclosed in a ABS Flange Mount Enclosure. They feature 11 position switches for fine adjustment of sound level. All circuitry is housed on a PCB with screw terminals for easy installation. They include override relay for emergency paging applications & a 22F bipolar capacitor for line monitoring purposes.