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- Hands-free communication between indoor and outdoor units
- Supports door release function for convenient entry control
- Compatible with both AC and DC type door locks
- LED brightness control to indicate operating status
- Expandable system supports up to 4 doorphone units
- Enables mutual calling and communication between doorphones
- Indoor unit (KDP-Q81F) operates on 100-240V~, 50/60Hz power supply
- Outdoor unit (KD-Q81T) powered by DC 12±2V supplied from indoor unit
- Operating temperature range: Indoor unit 0℃ to +40℃; Outdoor unit -10℃ to +50℃
- Surface mount design for easy installation