You can unlock the Qrio Lock with a card or PIN. Smart locks for greater peace of mind and convenience. No need to worry about forgetting your keys. Even if you forget your smartphone or card when you go out for a bit, you can unlock it with your PIN, so you can relax. You're free from physical keys. Easy installation with no construction required. Installation is as simple as attaching it with the included double-sided tape. There's no need to drill holes in the door or require any special construction. The double-sided tape is designed to be difficult to peel off and leave minimal residue, so it's safe for rental properties. 【Product Components】 Model Number Q-KP2/B Color Brown JAN Code 4573191100560 4573191100577 Power Supply DC6.0V, CR123A lithium battery x 2 Communication Bluetooth® Standard Ver4.2 (LE) Output Bluetooth® Standard Power Class 2 External Dimensions Approx. 56.0(W) x 44.1(D) x 160.5(H) mm Weight Approx. 197 g (body only) * Weight including 2 CR2032 coin-type lithium batteries: approx. 230 g Product Components Main unit x 1 CR123A lithium battery x 2 Mounting bracket (attached to the main unit at shipment) Qrio Card x 1 Start Guide/Reference Guide (this book) x 1 Manufacturer Qrio Inc.