... Website:http://www.dayangwelding.in, monitor, intercom, unlock, hands-free,Gross Weight :1.5Packing Size :285*188*123mmFeedback1. ... Introduction2. FeaturesWith calls, monitor, intercom, unlock, hands-free, two-way intercom call between the indoor units. Don ... black steel colored brushed aluminum chassis panel. 2 hands-free intercom function 3. Eclectic lock-control function4. Monitor ...