The E-10A and E-20B are telephone line powered speaker phones designed to provide two way hands free communication. Both function identically, but are available in two different housings to better suit the application. When the "Call" button is pressed, the E-10A or E-20B will come off-hook and will remain off-hook until a CPC signal is detected, the programmed timeout has elapsed, a busy signal is detected, or the call goes silent, making the unit automatically disconnect.

• Alternate action call button to place or cancel a call
• Intelligent call progress detection for automatic hang-up on CPC, silence, busy signal, or time out
• Telephone line powered
• Adjustable microphone and speaker volume
• Programmable maximum call length
• Selectable auto-answer feature allows remote monitoring
• Two-way handsfree communication
• Programmable VOX (mic / speaker) switching speed
• Vandal resistant black powder painted aluminum faceplate with heavy duty 316 stainless steel call button and mounting gasket
• Flush mount using the included rough-in box or surface mount