Viking handsfree phone in stainless steel. Provide reliable and intelligent communication - in noisier locations. Designed to provide quick and reliable communication in noisier areas. Mic sensitivity is set to a low level until the TALK button ispressed then it is raised to a normal level. In this way, the E-30-PT assures that the called party's voice will be broadcast over the speaker. In applications where the background noise can be louder than the person calling, a handset type phone isrecommended. Built in dialer. ntelligent call progress detection for automatic hang-up when the call is completed. Can be programmed to dial up to 5 different numbers on ring no answer or busy and can be configured to dial these numbers until answered. Applications: non-ADA hot-line phones for: terminals, stadiums, parking lots/ramps,convention centers, ATM machines, gate and door entry. Phones for: business lobbies, vehicular and pedestrian gates, residences. Push to talk button. Phone line powered. Vandal resistant, stainless steel faceplate with heavy-duty metalcall button. Non-volatile E2 memory (no batteries required). Touch tone or pulse dialing. Programmable to dial up to 5 numbers on busy orring no answer. Red off-hook LED indicator. Hangs up on CPC, silence, busy signal, return to dial tone, time out or a touch tone command. Programmable to auto-answer on incoming calls. Remotely programmable. Extended temperature range (-15Deg. F to 130Deg. F). Minimum ring voltage: 90VAC RMS. Dimensions: overall 5" x 5" x 2.25", plastic electrical box 4" x 4" x 2.12". Connection: RJ11 jack.