These are being used to prevent theft of autos, provide increase security in buildings, to operate electronic gates, garage doors, computers,etc. Consists of a small key fob that is totally self contained (no moving parts or batteries) and a proximity sensor and associated receiver circuit box. When the key fob is brought within 2 inches of the sensor, the unique date incoded in the key fob is transfered to the sensor-receiver, activating whatever device-relay, solenoid, light, locks, etc.- that you have connected to the receiver. These are brand new units consisting of two key fobs,  and a receiver box with sensor. The receiver is very sophisticated and can not be activated except by the key fobs that come with it.   The coding of new keys does not use a compute and can easily be completed in a few second period. The system is absolutely amazing. The reciever operates on 12 VDC  Details:  crunch resistant.  meant to be attached to your keychain and has a recessed circle to allow you to place a custom label (if desired). The sensor is about 1" x 1. and is attached by 20" to receiver box. The sensor can be mounted in wood, behind glass or plastic and still function perfectly.   when the correct key fob is brought within 2 inches of the sensor. THE relay will close , and when key removed from sensor relay will open.This new technology has thousands of applications. As soon as you buy one of these units you'll want to purchase more as you realize all the different ways it can automate or control security tasks. Brand new with complete instructions,UNIT WILL COME WITH COMPLET WIRING DIAGRAM.

Features:

• RFID unit with relay and two RFID fobs.
• Keys are waterproof and crush-resistant
• Operates on 12v DC
• Operating frequency 125KHz
• Sensor can be mounted in wood or behind glass or plastic and will still function perfectly.
• 10 amp relay triggers when unit is activated.
• Sensing range is about 3"

NOTE: The plastic key fobs can be opened to access the discs within. Discs are very small and thin, making them perfect for attaching to props or concealing inside objects!

To Flash New Keys:

1. Ensure the unit is powered on.
2. Remove the cover from the yellow box.
3. Press the button on circuit board.
4. Tap the fobs or cards you want to flash onto the reader.
5. Press the button again to finalize. 

Remove Keys:

1. With the unit powered on, press and hold the button for 3 seconds.
2. Tap the cards or fobs you want to remove.
3. Press the button again to finalize

Wipe All Keys:

1. Make sure the unit is powered off.
2. While powering on the unit, press and hold the button.
3. Once the unit powers up all stored key codes will be e