pecially for apartment
Material: Alloy Zinc
Color: Peony Golden & Silver
Undervoltage alarm: 4.4V±0.2V
Operating frequency: 13.56MHz
Size: 246*77*210mm
Weight:3500G
Door thickness: 40 to 50 mm
Standard Voltage: DC6V, 4 pcs of AAA Dry Cell
Don't need USB card issuer, don't need to install software