BT&WF TTLock smart cylinder coded door lock (60mm) Cylinder-type smart locks are suitable for both indoor and outdoor use, as they are resistant to moisture, cold, etc. These are battery-operated electronic door locks, so they are suitable for all doors (both new ones and existing ones). These locks are especially popular for rental businesses like AirBNB, hotels, offices, and more. This lock is extremely easy to install, there is no need to run wires, install additional shutters, readers, etc. Such cylinders are suitable for all types of doors. Material Stainless steel, aluminum, plastic Methods of opening RFID Magnetic card, Bluetooth, WiFi PIN code Application Office, apartment, house, school entrance door, hotel and others Color Metallic colors (silver) Cylinder length 70 mm Operating voltage 3.6-5V (3x AAA Batteries, purchased separately) Battery life about 1 year Standby power consumption <10µA Energy consumption during opening <135mA Low voltage alarm Yes Electrostatic protection 15KV Bluetooth distance up to 4-5 years Number of openings 100000 times Relative humidity 20%-90%RH Temperature -20℃-60℃ Resistance IP44 Dimensions (mm) 195×53