Size: 48mm x 76mm x 26mm. (Slightly bigger than a matchbox).
1 600 authorised users - When these users make a missed call, the gate/door will open.
400 special restricted users - These users can be set up to open the gate during certain times and certain days of the week. Users can also be set up to open the gate a certain number of times and then the user will expire.
Operating voltage: 5 - 30 VDC.
Unit is programmed via SMS.