I have found some answers here:
http://rusecure.rutgers.edu/services/authentication-token-cards/safeword
Safeword FAQ
Q:
What are the differences between a Platinum V1, Platinum V2, and Gold 3000 token?
A:
Platinum V1: Older cards, distinguished by a gray bar running across the front of the card. Non-replaceable batteries.
Platinum V2: Newest version of the Platinum cards with replaceable batteries. Has an "L" shaped blue or grey sticker on the upper right hand corner.
Gold 3000: Functionally identical to the Platinum cards except in a small keyfob form. Non-replaceable batteries.
We currently issue both Platinum V2 and Gold 3000 tokens. If you prefer a specific token type you may request the type of card you prefer (availability is dependent on current inventory.)
Q:
I'm having difficulty reading the token's display. Is that a "zero" or an "O"? Is that a "one" or an "I"? How can I tell the difference?
A:
The token uses what we call a "friendly" display mode, intended to minimize confusion between similar characters. This includes numbers 0-9 and six letters. Only these characters are used in passwords: 0 1 2 3 4 5 6 7 8 9 A H C P E F
Q:
The "on" button on the card does not seem to work and my display is blank/fading. What should I do?
A:
The battery may be dead or dying. If you have a V2 Platinum card, you can replace the battery. Access the battery by unscrewing the two small screws on the back of the card and removing the battery cover. Otherwise, if your card's batteries cannot be replaced, contact Safeword Support for replacement.