1. Keyless Smart Cylinder ,Solution For Smart Home 2. Easy Replacement And Installation, No Breaking The Door Or Change The Door Body, Simply Use A Hex Screwdriver To Install In 10 Minutes. 3. Your Smart Housekeeper Always Keep Your Safety 4. Support Permanent Password And One-Time 5. The Advantage Of The Smart Cylinder Material: Aluminum Alloy + Brass Unlock Way:Card/Password/APP/key IP Class:IP5x(Dust and Splash Proof) Power supply: 1xCR123A(Alkaline) Installation: Intermediate;Tools required(lncluded) Available Thickness: 35MM~60MM Emergency Power: 1X Micro-Type-C charging port Product Dimension:Front:193x75mm Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour: A: Black Package Contents: 1 x Lock 2 x Card 2 x Key 2 x Suction Cup 2 x Hexagon Wrench 1 x Screwdriver 1 x Reset Card 1 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.