Industrial wall live voice intercom system with 6 buttons for direct call, one button for general call, end conversation and a “call/listen” button. The “talk/listen” function is selectable using led tx/RX. Speaker Power >100dB(A) @ 1m. Local Power Supply required: 24Vdc. Made of light alloy of aluminum. Degree of protection IP66. Dimension: 300mmx160mmx67mm. Operating temperature: -40/ 70 °C.