Please read this description thoroughly and don't forget to contact us with the SIZE of your JavaRing when you order, making sure it is one of the AVAILABLE sizes listed below.

What a Unique Gift! Don't know what to get for yourself, or give to a family member or coworker for a birthday, promotion, Holiday, going-away, graduation, retirement or special occasion gift? We have acquired the few remaining brand-new, original Sun Microsystems JavaOne Conference JavaRings in a variety of four sizes to fit your pinkie or ring finger, complete with illustrated information foldout. JavaRings are VERY RARE, collectible memorabilia and also make a perfect, unique gift for yourself or for that Java Developer, Sun Microsystems aficianado or "computer geek" in your life. The unique JavaRing will be an especially treasured and memorable keepsake and conversation piece!

What is it? A JavaRing is a very handsome and comfortable stainless steel ring that contains a small microprocessor, each with a unique address and built-in capabilities for the user - a sort of smart card that is wearable on a finger - with 32 kilobytes of ROM and 6 kilobytes of NVRAM. 6K may not sound like much, but it's 20 percent more memory than the first computer some of us used back in high school, which could take up a lot of space. And now you can carry more computing power on your finger! Even 6K is enough to hold your secret codes, credit card numbers, driver's license information, other wallet contents, and even maybe some electronic cash. The ring may also be able to store a few important URLs. Indeed, one of the Java One Conference JavaRing demos showed the ability to walk up to any computer in the world that has a JavaRing reader and have your home page loaded simply by touching the ring to the reader.

The History: Sun Microsystems' JavaRing, manufactured by Dallas Semiconductor, was introduced in 1998 at Sun's huge annual JavaOne Conference at the Moscone Center in San Francisco. Instead of a gemstone, the JavaRing contains an inexpensive microprocessor in a stainless-steel iButton running a Java Virtual Machine and preloaded with applets (little application programs) with a built-in Java Card 2.0 specification. Workstations at the conference had "ring readers" installed on them that downloaded information about the user from the conference registration system. This information was then used to enable a number of personalized services. For example, a robotic machine made coffee according to user preferences, which it downloaded when the attendee simply touched the ring to another "ring reader." Data was read from or written to the memory serially through a simple and inexpensive RS232C serial port adapter, which also supplied the power required to perform the I/O. The iButton memory was then read or written with a momentary contact to the "Blue Dot" receptor provided by the adapter.

These unique JavaRings are currently offered as a collectible memento and high-tech novelty. Originally manufactured by Dallas Semiconductor in 1998, they are still brand-new; yet there is no guarantee that they will work and perform all the tasks you would want, or are suitable for any particular purpose. However, there are adapters and Blue Dot receptor-readers and development kits available for the iButton, which is at the heart of this ring. (One happy return customer in Australia recently emailed us and told us he has been able to "read" his JavaRing with an Arduino and uses it as a backup security device... Another happy customer emailed us in October of 2016 to say, "Thank you so much. Using a USB to one-wire adapter and drivers built into Linux, I can read the ID from the ring, even 18 years after it was made!"; and in May of 2021, a customer gave us positive response, saying, "Quick shipping, the ring came as described. I quickly whipped some Arduino code to check if it is still operational. 30 seconds later I got the ID from it. Fantastic.").

Please Note: The Blue Dot receptor/reader is not included with the JavaRing; the photo of it on this page is for clarity and reference. You can search the Internet or Google "Blue Dot Reader", "Java Ring" or "iButton" to connect to websites and do your own research for more product information if you wish to pursue the possibility of activating your JavaRing iButton. If unable to activate it, you still have a VERY RARE and handsome, highly collectible and comfortable stainless steel fashion ring that is certain to be a unique conversation piece, complete with the JAVA logo, "Sun Microsystems" engraved on the corona beneath the iButton, and Sun's unique stylized logo engraved on each side.

JAVARING SIZES AVAILABLE:US/Canadian Standard Ring Size 6.75, 7.0, 10.25, and 10.5, all accurate to within +/- 1/8 size, which fits most finger sizes worldwide. If one of the above sizes doesn't work for you, consider the other hand or a different finger. VERY IMPORTANT!:Please specify each ring size in the "add message to seller" box upon checkout, or in a separate email! If we don't hear from you within two days after payment which ring size(s) you want, we will have to fulfill our shipping deadline agreement with by sending your JavaRing(s) in size 10.25, which is a very common size.
(International Ring Size Conversion Chart): For most international ring sizes, you can Google or search the Internet for "International Ring Size Conversion Chart" to easily convert an international ring size to a JavaRing in one of the above available US/Canada Standard Ring Sizes. Please note that Ireland and former British Commonwealth nations like Australia, South Africa, and New Zealand, etc., generally go by UK sizes. China uses the same ring size as Japan.

EXCHANGES/RETURNS:
Wrong size? No problem! U.S. ORDERS: You may exchange your JavaRing within 7 days for another ring in one of the above sizes. Return to us the JavaRing and informational foldout in the poly bag, along with a note or email of the correct AVAILABLE size desired, and we will perform one free size exchange and pay for free shipping back to you (USA addresses only). INTERNATIONAL ORDERS: Return to us the JavaRing and informational foldout in the poly bag, along with a note or email of the correct AVAILABLE size desired, and add $7.00US via cash or PayPal for handling the exchange and the return shipping back to you via USPS International First Class Mail. There are NO refunds - only exchanges for a different available size.

SHIPPING:
US Addresses: Your choice of either USPS Ground Advantage - or USPS Priority Mail with only one low fee for up to 10 JavaRings. (We will automatically upgrade to Priority Mail shipping if the number of JavaRings you order warrant the savings, and we will rebate to you any unnecessary extra shipping charges).
Non-US Addresses:USPS International First Class Mail shipping cost varies by weight and destination, and will calculate it for you.
Combined shipping of multiple items or other lots we currently have here on also saves big on shipping costs! (Please wait for an invoice from us BEFORE completing payment - invoice will show the discount).

Important International Shipping Policy: Any possible customs duty or fees is the responsibility of the buyer.

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