Electric door battery can opener is not a luxury for the owners of property dependent. There are many complex technologies and models of your choice: light sensors, motion detectors, shock sensor, infrared, keyboard, remote control or even open your garage door or using the mobile phone. All these combine electric and hydraulic technology, but the most popular keyboards and remote controls. When choosing a door battery can opener controlled by the keypad, you should consider the type of engine door of your garage door or uses. A major advantage of keyboards is that they use encrypted passwords (with a minimum of three digits) to open the doors and are very safe. You may even consider changing the password from time to time for added security. In addition, you will not lose the door battery can opener and can not enter your home. To increase security, you can purchase a more expensive and sophisticated equipment and connect it to an alarm. Remote controls are the devices most commonly used to open the electronic doors. As technology is constantly advancing, remote controls have improved considerably. The most traditional levers are those of the battery can opener works with one or two buttons used to open and close the doors. Different types of remote controls also work on Bluetooth or radio frequencies. Today, most remote work using Bluetooth technology, because it can provide a rapid response, clear. An alternative to Bluetooth is infrared, which is durable and inexpensive to build. The great disadvantage of infrared remote controls is the need to report them directly in line with the receiver on the side or bottom of the door. At present, opens up distance is very secure because they use the strict algorithmic procedures Bluetooth or radio frequency. You should not worry about security, but for your own peace of mind we advise you to consult with the seller of the unit. As you can see, both technologies have advantages and disadvantages, so it is best to choose one that suits your lifestyle. For example, if you want to go out without carrying out a key the best option is a door battery can opener keypad. . . The phrase "no matter what you say but how he says" is so true, but you can say anything the way it should be said, you must evolve as a whole, and you will not improve without practice . No matter how much you read, how much you study. For the start of practice is made easier, we sometimes decorated or canned openers, as are phrases and techniques that: 1 - have been tested several times 2 - Facilitate the beginning of the interaction; 3 - make it possible for many other subjects . .