Lightweight headset allows users to hear both radio audio and their surrounding environment. Two temple receivers convert audio into sound vibration and transmit into the inner ear without covering the ear. Easily adjustable for an exact fit, worn behind the head. Includes a noise-cancelling in-line microphone with replaceable windscreen and push to talk button. Expandable Up To 5 Handsets 15 Minute Digital Answering System 1 Mailbox - Time and Day Stamp, Call Screening. Intercept, Handset Message Access Hearing Aid Compatible Wall Mountable Handset Speakerphone Compatible w/ Bluetooth Enabled Cell Phones & Wireless Headsets 3-Line Backlit LCD Display Call Privacy On / Off 30 Station Name / Number Caller ID Memory 30 Station Phone Directory / Dialer 30 Number Call Log 9 Station Speed Dial Selectable Ringtones Earpiece / Ringer Volume Control Intercom Handset to Handset Call Transfer Tone / Pulse Dialing 5 Number Redial Mute Flash Clock Display Up To 8 Hours Talk Time Up To 100 Hours Standby Time Call Timer Low Battery Indicator Call Screen / Record From Handset Trilingual Menu Support (English / Spanish / French)