4.3-inch LCD display with easy-to-press metal buttons; screen resolution 800 × 480 2MP CMOS; true WDR 316 stainless steel panel; IP65, IK08 Operating temperature: –30 °C to +60 °C Auto light illumination reduces light pollution Multiple verification methods: Password, IC card, QR code, and remote unlocking Support 20,000 users and 10,000 cards Support full duplex; management platform, and voice call through APP Support SIP server, and can manage 500 indoor monitors at most Support duress alarm, tamper alarm, and door sensor timeout alarm