MEL Card for the 394 / 392. this is the 68 contact card. Ver 2.01. The contacts are on the short edge of the card. To remove it from the instrument either pull it out or there is a button next to it that you push to pop it out. This 68 pin MEL Card can be used in an older instrument that was designed to use a 50 contact MEL Card by buying an adapter from Biolytic (PN: 181-104604). This is a card that has a battery which may need to be changed occasionally. We also offer this card in a FLASH RAM version that does not have a battery and therefore does not need to be reprogrammed ever.