RF (radio frequency)- Remote Controlled Wireless DEADBOLT- Brass Finish This lock provides the convenience of keyless access to your home and will lock and unlock the door using a remote control radio frequency (RF) system. This signal can be used from inside or out from *150 feet away. Radio Frequency opposed to Infrared. Radio Frequency is like the remote control for your car. This is not line of sight like some T.V. remotes where you have to see the door lock. This will work in all directions. Catalog #: ats4399b If your hands are full or you have difficulty opening a door, this is for you. Solid brass DEADBOLT Tarnish free brass finish Easy installation (10 minutes or less) No external wiring required Deadlock Suitable for all domestic uses inside and out Suitable for the disabled Unlocks the door from any direction from up to 150 feet (*your environment may effect range) The remote will unlock the door from the inside and the outside Auto lock feature (not on dead bolts) will lock your door automatically in 10 seconds after every unlock entry. (Can be turned off to use as a passage-mode function) Panic exit function (The door can be opened from the inside at all times by using the doorknob) 2 remote transmitters plus 2 additional keys for conventional operation Anti-scan code hopping technology Audible tones for lock, unlock, jam and low batteries Powered by 4 AA 1.5v alkaline batteries (always use good quality ALKALINE batteries) Low battery consumption Power for approx 6 months operations before the batteries need replacing Low battery alert Specifications: Suitable door thickness: 30m (1 OE inch) to 48m (1 7/8 inch) Adjustable latch 60m: (2 3/8 inch) to 70m (2 inch) backset Cylinder: 5 pins tumbler Box includes everything but 4 AA Alkaline Batteries *RF (Radio Frequency) Remote Doorknobs and Doorlocks all have a tested range of 150 FEET. Photos of entire kit and inside view of kit Outside View Inside View What Is Included: 1 Year Manufacturer warranty- 30 days to try and return. * The manufacturer lists a range of 30 feet. Our extensive tests have consistently shown a much greater range, up to 150 feet in most cases. Your environment may affect the range and make is shorter than 150 feet. If you do not experience a range up to 150 feet and wish to return this product, you may do so and we will issue you a refund. On Apr-09-11 at 09:43:54 PDT, seller added the following information: SquareTrade AP6.0