Features: Use the access card to unlock when entering or leaving the door. Support EM or SM compatible card, long-distance high-speed card reading, internal and external double-reading card. It realizes the integration of the access control host and the smart machine lock, and is compatible with the unlocking signals of all building intercom systems and access control systems. There is an anti-slam door alarm. It will alarm if you do not close the door on time. After the door is closed, it is automatically locked. The state of the lock has sound and light prompts, and the door is closed without collision, noise, and environmental protection. The integrated structure design has high anti-destructiveness, reasonable circuit and mechanical design, easy installation, simple operation, and durability. Suitable for homes, offices, schools, hotels, factories, warehouses, etc. Specifications: Condition: Brand New Color: Silver Material: Zinc Alloy Input voltage: DC 12 V Static current: <38mA Operating current: <350mA Operating temperature: -40 ~ 70 ℃ Operating humidity: <95% Single Type Unlock Way: External Metal Key, External Master Card Unlock Way: Bidirectional Key, External Master Card RF card unlock reaction time: <0.5s, card reading distance: <20mm/0.8in Packing Size: Approx.13 x 10.5 x 8cm / 5.1 x 4.1 x 3.1in Package Weight: Approx. 1263g/44.6oz Package List: 1 x Lock Body 1 x Lock Ear 1 x Outdoor Sensor Shield 1 x Mechanical Lock 3 x Mechanical Key 1 x Management Card 2 x ID Card 1 x Mounting Screw Package 1 x Instruction Manual . Note: ID card color is random.