How to Use: Put four AA batteries (not included), install and download the corresponding APP according to the instructions in the use manual Specification: Item Type: Smart Lock Material: Zinc Alloy, Stainless Steel, Glass Weight: Approx. 1315g/46.39oz Color: As Shown BT Standard: BT 4.1BLE Fingerprint Storage Capacity: 120 Card Capacity: 200 Card Type: IC Card Password Number: 150 Groups (Including Customized and Permanent) Temporary Password: Unlimited Application: For TTlock Unlock Times: > 300,000 Scanning Time: < 0.5s Error Rate: < 0.001 Percent Operating Temperature: -20 degree centigrade to -70 degree centigrade Working Humidity: 20 percent to 90 percent Service Life: 300,000 Times Applicable Door Thickness: About 35 to 55mm/1.38 to 2.17in Battery: 4 AA Alkaline Battery (Not Included) Low Electric Alarm Voltage: 4.8V Suitable: For Indoor Door, Wooden Door, Room Door, Apartment Door, Rental Door and Office Door Package List: 1 x Front Lock Plate 1 x Rear Lock Plate 1 x Lock Bolt 1 x Use Manual 8 x Screw 2 x IC Card 2 x Key 5 x Accessory