SPECIFICATIONS :
Weight:  1.2 lbs.
Dimensions:  2.375"W x 2.625"H x 7.52"L 
TSO:  C37c, C34d, C36d, C38e, C40b, C66b, C41c, C74e
RTCA Document:  DO-160A 
EUROCAE:  MPS/WG 8/1/71; ED-14A
DEUTSCHE BUNDESPOST FTZ:  A446R2010 
Environmental:  DO-160A categories /A2C1/B/PKS/ EXXXXXZ/BZ/AZZ EUROCAE ED-14A
Temperature:  -30 to +70C 
Altitude:  35000 ft. max.
Shock:  6 g operational 
Power Requirement:  27V dc (16-32) at 0.25A
Lighting Power:  5V ac/dc. 350mA or 28Vdc, 100 mA 
Lighting Color:  Blue-white
Display Type:  Gas discharge 
Brightness Control:  Automatic or external potentiometer
Electrical Input/Output:  EIA RS-422A 
Input/Output Commercial Standard Digital
Frequency Range:  190 to 1799kHz (normal); strap option adds 2179-2185kHz (if ADF rec has this range) 
Format: Bus (CSDB)