Feature: 1. Supports Bluetooth app remote control of the switch status of the lock, and it also has the unlocking methods of Bluetooth unlocking, password unlocking, mechanical key unlocking, and card unlocking. The password design adopts a virtual password design to effectively prevent others from peeping. 2. High‑frequency encryption card, not afraid of degaussing, compact and light, easy to carry. The card can support up to 100 users to share experience, support mechanical key unlock function. 3. Automatic sleep low power consumption mode, low battery prompt and USB emergency power supply interface, you can use it with ease and the electronic digital touch keys with ethereal key sounds,can let you enjoy a comfortable and rest assured life . 4. This product supports remote control and sharing time‑limited password functions, allowing you to control the safe use of home locks anytime and anywhere, and also supports for Amazon Alexa and for Google Home voice control systems. (Only by cooperating with the gateway can the remote lock and voice control be realized. However, the delivery does not include the gateway, which needs to be purchased by the customer himself) 5. Zinc alloy design, stainless steel lock body for the lock cylinder, making the lock durable and still as new. The length of the nut with multiple fits meets the installation requirements of most door designs in various scenes, and the installation is stable and convenient. Specification: Condition: Brand New Item Type: Password Door Lock Material: Aluminum Alloy Color: As Pictures Shown Unlock Method:TTLOCKAPP Unlock, Bluetooth Unlock, Password Unlock, Card Unlock Card Type: 2pcs M1S50 Card USB: Support USB Emergency Power Supply. Working Voltage: 4.5-6VLock Body: Single Tongue Lock Body(Stainless Steel) Password Capacity: UnlimitedCard Capacity: 100 Applicable Door Thickness: Approx. 35-55mm / 1.4-2.2in Distance from Panel to Lock Cylinder: 60mm-70mm / 2.4-2.8in Power Supply: 4pcs AA Alkaline Batteries (shipped Without Batteries). Package List: 1 x Front Host of Lock Body1 x Back Host of Lock Body1 x Back Cover of the Back Host of Lock Body2 x Black Pad2 x Card1 x Single Tongue Lock Body1 x Steel Bar Key3 x Big Flat Screw4 x Small Flat Screw4 x Large Pointed Screw2 x Connecting Tube1 x Connection Tube with Screw 2 x Key1 x Panel Snap Ring1 x Inner Snap Ring Note: