Verified Supplier

We are the distributors for various RFID products like Proxmark3, ChameleonMini and also RFID cards. Company is also involved in project management of USBninja, Proxmark3 Rdv4.0.

4 Byte UID Mifare 4k S70 UID Changeable

$18.00

MIFARE 4 byte UID 4k S70 Cards – UID CHANGEABLE

MIFARE 4 byte UID 4k S70 Cards – UID CHANGEABLE

Write to Block 0 to change UID

Supports fully unlocked read / write
Impossible to block / brick
LibNFC / nfc-mfultralight compatible
Proxmark 3 compatible
Android compatible

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Dear Customer, if applicable, the Product Documentation, Reference Materials, CAD or Drawing file(s), Manuals and Tutorials will be available for download upon purchase. The order confirmation email will include a Downloadable Link to the product file(s) which can also be downloaded from the My Account section if needed. If you can’t see any of these files in your account, please contact us immediately. We’re here to help, whenever you need us. Thank you.

If you have any questions with regards to this product, please fill out the form below. When you submit this form, the product URL will be included automatically.

RfxSecure is incorporated in Singapore but we are based in Shenzhen for logistics purposes. We sell direct from factory as we have merged with a few companies in China to give the best value to our customers.

Shipping Policy

DHL (Comes with tracking)

Return Policy

EXCHANGE POLICY: Oz Robotics wants you to be happy with your new purchase. However, we abide by the exchange policy of our suppliers because we do not manufacture these products, our suppliers do. Please read the product exchange policy that is defined by each supplier for their own listed product(s) which can be found under the Shipping tab on each product page. Once you have used the product, we and our supplier(s) have the right to not issue a refund, but exchange for the wrongly purchased items, or products have serious and irreversible quality defect problem(s). In the case of wrongly purchased products or any other similar issues, the shipping fee will be paid by the buyer/customer. If the product you purchased is defective, please email us at support@ozrobotics.com with some photos, or a video of the defective parts for us to evaluate before you send. Click HERE for more on Exchange Policies.

REFUNDS and RETURNS: Oz Robotics accepts returns on a very limited basis, which unless there is a manufacturing defect. For any electronic items, returns are only accepted on devices which have serious and irreversible quality defect problem, meanwhile, the buyer/customer must apply for the returns within 14 days from the date of delivery. Before a refund acceptance please include images or a video, and any other material proof of the defect. However, we abide by the exchange policy of our suppliers because we do not manufacture these products, our suppliers do.

Please check our supplier Exchange Policy under “Shipping” tab on each listed product page. Other than our supplier’s default policy, once a return is agreed upon, then you can ship your defective item to the provided return address that you should receive from us first. Please ship the order in original packaging with all the accessories and additional parts. If the Required Parts are not sent back, then it will be billed for, or expected to be shipped at a later stage. And only once all items have arrived as a full system, then we can check the returned product for testing. Include in your package a signed letter stating the reason for your return and the original receipt as well as any above mentioned proof of defect, images, or a video etc. This will help us to speed up the process on your behalf.

The purchaser (customer/buyer) is responsible for all shipping costs when returning an item. However, upon receiving the returned order, we will assess the product, and if it is determined that there is in fact a manufacturing defect then we will refund the shipping costs as well as repair, or replace or refund the full amount to the purchaser if the product is not fixable.

If you wish to return a product, please do so within 14 days from the ship date for a refund on the purchase price, minus shipping, handling. Refunds will be credited to the original credit card use for payment in 24-48 HOURS after receiving the product back. We will charge 20% restocking fee.

Once your return is received and inspected, and if agreed for a refund, then refunds will be credited to the original credit card used for payment in 24-48 hours. Please note that we will charge 20% restocking fee if you want to return a product that does not have any defect.

Once your refund is processed, then PayPal will return the money to the card that was used. It may take at least 5 business days (depending on the bank and credit company) before your refund is officially posted in your bank account and statements. Contact Us if you still have not received your refund after 5 business days.

Do not return your product to our New York office. For any exchange or refunds, please email us first at support@ozrobotics.com for us to provide you with the steps that need to be followed. Any product you return must be in the same condition you received it and must be returned in the original packaging without being used. Please keep the original receipt. Click HERE for more on Shipping, Exchange and Refund Policies.

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