50pcs/lot rewritable RFID Touch Memory TM Key RW1990 iButton Copy Card Sauna Key
ID: 42759

50pcs/lot rewritable RFID Touch Memory TM Key RW1990 iButton Copy Card Sauna Key

4.9 (111 votes) | 208 orders
Price: US $35.11 / 50 pieces
Discount Price:
US $ 28.82 / 50 pieces


There are five colors, normally we will send by random, if need specify the colors, please leave message to tell us, we will obey to send.


RW1990 feature:

  • 1.RW1990 ibutton
  • 2.Low-cost
  • 3.water proof
  • 4.Rewritable ,DS1990A and TM1990A iButton ,
  • 5.can be copy,RW1990
  • Technique Parameters:
  • America DALLAS encryption
  • Breakdown Rate:1/100,000
  • Serial Number:Only global 64 bit numbers
  • System Logic:64bits pin protection
  • Memory:8kb RAM
  • Inductive Type: touch
  • R/W and encrypt
  • R/W times:1,500,000,000
  • Working Temperature:-40~85
  • Rewritable ibutton RW1990A-F5 read-write type of card, compatible ds1990a.
  • Rewritable,DS1990A and TM1990A iButton ,RW1990
  • Unique 64-bit registration Number;
  • Built-In Multidrop Controller for 1-Wire Net;
  • Digital identification by momentary Contact
  • This RW1990 chips we use imported one,
  • which approved to be reliable performance than others,
  • CMOS microcircuit is essentially an electronic carrier of the unique 64-bit digital code.
  • The code is stored in the internal nonvolatile memory.
  • The data exchange is performed by the protocol 1-Wire,
  • which requires one sole data pin and the common pin.
  • The microcircuit supports the function of the protocol 1-Wire of ROM search,
  • which makes it possible for several devices to operate on one bus.
  • This protocol determines the alteration conditions of the bus status
  • and the time intervals during synchronization by the synchropulses cuts of the control device.
  • Data readout and writing are performed by the junior significant bit forward.


  • TM card, also known as touch memory, electronic key
  • Stainless steel package with su304#,
  • rugged, never rust, corrosion; resistant to heat;
  • Anti-variant; sealing strong;
  • for security patrol, sauna door locks,electronic door locks,
  • door intercom, card systems, identification, banking,
  • Communications, rail transportation, transportation, and so many fields
  • Information ibutton RW1990 memory 64, can be repeated rubbing, write the diy code.


  • is_customized: Yes
  • Model Number: RW1990FY
  • Brand Name: 5YOA
  • Origin: CN(Origin)


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some location we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:

Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.

If you did not receive the product within the guaranteed time(45 days not including 2-5 day processing) you can request a refund or a reshipment.

If you received the wrong item you can request a refund or a reshipment.

If you do not want the product you’ve receive you may request a refund but you must return the item at your expense and the item must be unused.

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of Useck - Security & Protection (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of useck.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.



Thank you for your interest doing business with us!

If you would like to get a discounted price for your large purchase orders, fill in the required blanks along with your email address, the product Item ID # and/or the link of the item that you want to order, item quantity (minimum of 30 pieces), shipping country and payment method is required. We will contact you with a discounted price as soon as we receive your inquiry.

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