1. Swipe in and enter the card when you go out. We usually call it "two-way access control" or "two-way card reading". The advantage of this method is that the security level is high, and it is generally not allowed to be casually released. The people who go out have records to query and know who is out. Which door. 2, swipe to enter, do not need to swipe the card when you go out, press the door open button to open the electric lock to go out. We usually call it "one-way access control" or "one-way card reading". The advantage of this method is that it is convenient and easy to go out. This method is more convenient and safer than the first method. Internal staff), the cost is lower, this method is more popular, and for the sake of cost performance, most of the internal departments of office access control adopt this mode. The "going button" or "opening button" used in this mode is an integral part of the access control device. The principle of the exit button is actually the principle of a doorbell button. When pressed, the two internal contacts are turned on. When the button is released, the button bounces back and the contact opens. Therefore, some people in the project can use the doorbell button to make the door button. Just the doorbell button usually prints a "bell" pattern on it. Divided by material: can be divided into plastic buttons and metal buttons. Plastic buttons are cheap, durable and look like no metal buttons. The metal button looks high-grade and has no plastic button length, but it can also be used for many years, and the touch will be more forceful. Divided by size: can be divided into 86 bottom box buttons (we usually power sockets on the wall, the bottom box of the fluorescent switch is the 86 bottom box) and small buttons (small button size has a lot of total, the shape is more beautiful than the 86 bottom box button Some, but no 86 bottom box buttons are atmospheric and standard). Selection suggestions: If it is a weak construction of a standardized building, it is recommended to use the 86 bottom box button. If the decoration pattern is high-grade and gorgeous, it is recommended to use metal buttons. If the decoration style is based on the principle of practical simplicity and low cost, it is recommended to use plastic buttons. Some locations are inconvenient to install the 86 bottom box, the installation space is relatively small, such as stainless steel door frame (if the door frame is glass), it is recommended to install a small button. Shower Faucet,Bathroom Shower Faucets,Single Handle Shower Faucet,Bath Mixer Taps With Shower AIHUI Sanitary Ware , https://www.aihuisanitary.com