Headset connector connectivity can be connected to most hardwired intercom headset jacks for instant wirelesscommunication. Four-wire connectivity interfaces to four-wire/matrix intercoms and radio based communication systems. Assignable relay closure for advanced functionality. Built-in battery charger one-port battery charger charges a remote communicator battery in under three hours. Digital frequency-hopping, spread spectrum (FHSS) encryption technology ensures confidential communication. Approved for worldwide use. Assignable relay closure provides advanced functionality when used with matrix intercoms or radio based communication systems. Expandable compatible with the entire HME DX 200 and 100 series of digital wireless intercom products. Four-Wire I/O Connection 600 ? balanced, level adjustable. Headset I/O Connection 200 ?, level adjustable for interfacing to a Dynamic MIC headset connector.