CARMTEK brand. Resistant construction: The front and rear parts of the handle are made of high-quality zinc alloy and flame retardant nylon material, with IP65 water resistance and UL-94 V2 fire protection. Keyless entry: With 3 locking/unlocking options. You can choose to use the keyboard, wireless buttons or keys to block or unlock the lock. Easy installation: the package comes with clear and detailed instructions and with the mounting hardware you will need for the simple installation process, it only takes 5-10 minutes to install, while the input code programming is also simple with several touches. It adapts to the opening size of approx. 9.5 cm x 7 cm x 3.8 cm. Includes: 1 keyless door lock, 1 remote control, 4 AA alkaline batteries, 1 assembly tool set, 2 mechanical keys, 1 user manual.