Weiser has announced its latest electronic deadbolt, the Powerbolt 2. The unit eliminates the need for keys and can store up to six unique codes — including single-entry codes — so family, guests, neighbours or a dog walker can access a home at certain times as permitted. The Powerbolt 2 is easy to install and can replace existing door hardware with a screwdriver. No hard wiring is needed and the system operates on four AA batteries that will last for approximately one year. A new MasterCode feature increases security by preventing unauthorized users from adding or deleting user codes.