Trans Prox



Linear Trans Prox remotes comes with an integrated proximity chip that allows users to swipe their remote near a sensor to open common doors, gates and elevators without pressing the button. This functionality can be duplicated onto a much smaller and lightweight key blank.

Linear makes a very similar version of this key with 4-buttons. If you are looking for that model please click here.

This key is Snap And Send compatible which uses the serial number printed on the back of the key to make fully functional cloned copies. However, if the serial number has worn off, we suggest using our mail-in service.


Simply submit a photo of your key. Receive copies in as little as 1 business day after checkout.


You will receive instructions to mail your key to our office. Turnaround can be less than 2 business days.

  • Technical Specifications

Manufacture: Nortek Security & Control, LLC (Florida)
Alternative Names: Linear Trans Prox Gate Opener, ACT-31D
Format Names: HID® Prox®, H10301 & Mega Code
Technology: 125Khz proximity & 318Mhz Mega Code
Key Type: Low frequency proximity chip embedded in remote transmitter
Dimensions: 1.25″ x 2.25″ x 0.48″
Weight: 0.# oz (#g)
Material: ABS Plastic
125Khz Antenna Size: Unknown
125Khz Antenna Geometry: Round
125Khz Modulation: Frequency-shift keying (FSK)
125Khz Interface: Wiegand
125Khz Typical Range: Less than 12 inches
125Khz Bit Length: 26 to 85 bits
125Khz Possible Combinations: Over 137 billion combinations (according to manufacture)
125Khz Facility Code Range: 1 to 254
125Khz Storage Capacity: Less than 1K
125Khz Encryption: None
125Khz Security: Low Security (Class A)
318Mhz Security: None – fixed coding
318Mhz Typical Range: Receiver and installation dependent