China Heavy Duty Emergency VoIP Telephone Elevator Phone GSM Wireless Audio Intercom, Find details about China Intercom, Door Phone from Heavy Duty Emergency VoIP Telephone Elevator Phone GSM Wireless Audio Intercom
Telephone Versions | Analog,SIP,GSM,3G optional |
Operating Temperature | -30°C to +65°C |
Storing Temperature | -40°C to +75°C |
Ringing Tone | 80 dB @ 1 meter typical |
M.T.B.F. | excess of 50,000 hours using |
Power Supply | telephone line or DC or solar powered |
Weather Resistance | IP54-IP65 |
Casing Material | vandal proof steel body |