Dear buyer, Welcome to my shop, if you have any question please let me know, I will do my best to help you when received your mail(will reply within 48hours), thanks for your understand,if want many quantity or many items total please contact me,maybe will have a good price,Have a nice day! Note:For professional use only, need to know how to use and need what device to do,this kind of card should work with special device and the writable software,when you can not sure it can use for you please search it in google before or bid 1pcs to test. Hi,this item is the Rewrite card. is one writable ic chip and one writable id chip both in one card. 5pcs Writable 13.56MHz IC + 125KHz Writable RFID EM4100 dual chips in one card 2in1 Thin card For Access control Specifications: This card have two chips inside,one writeable 13.56MHz IC chips and one writeable 125KHz T5577 chip,so easy to use IC or ID only one card. The Writable IC Specifications: -Works exactly like the 13.56MHz , but the Sector 0 Block Zero known as Manufacturers Block where the Chip UID is stored, can be reprogrammed to any UID you wish. -Easy to carry -No external power required -You can write and draw pictures on the card by youself -The card made of high temperature composite materials, have superiorfolding characteristics -Operating Frequency: 13.56MHz -Storage Capacity: 8Kbit, 16 districts, each district two passwords -Read Distance: 1-5cm -Card Life: More than 100,000 times -Size:85mm x 54mm x 1.0mm -Typical Applications: patrol, attendance, access control systems, business card, bus card, highway The Writable RFID ID Specifications: -T5577 can clone/write to 125KHz EM4100 or 125KHz HID. -Operation Frequency: 125KHz -Read Distance: 1-8cm -Size:85.5mm*54mm -Typical Applications: patrol, attendance, access control systems Package Included: 5 x Writable IC+ID 2in1 Cards Shipping: We Ship to Worldwide. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying. The item will be shipped out within 48 hours on the weekdays ( Monday to Friday ) or the next business days on the weekend after full payment must be received. Only ship to the Address. Please make sure your address in is Correct before you pay. we are not responsible for any wrong or undeliverable addresses. We will ship out the item by AirMail from China or Hong Kong Post Office. If want send by DHL UPS EMS or other Express shipping please contact me to change the shipping cost. We will send the item as " GIFT " It takes about 15-40 working days to arrive. Sometimes take a little longer , Due to Local dispatch or other reasons, It might goes more than 20 days . Payment We accept PayPal only. All major credit cards are accepted through our secure payment processor PayPal. Payment must be received within 10 days of auction closing. Refunds Returns If you do not satisfied with your purchase, or if it is damaged when receive, please let us know, we will do our best to help. If the problem cannot be solved, please return it to me in the condition it was received within 7 days. we will send you replacement or give you a refund. All returns should include all original items undamaged, in re-saleable condition, all original packaging including manuals, warranty forms. Buyers is responsible for the returning shipping cost. We care about our valued customers, and will always try to help you. So if you have any problems, please message us immediately. Please give us the opportunity to resolve any problem. We understand the concerns and frustrations you might have, and will try our best to resolve the issues.Please contact us BEFORE leaving any negative or neutral feedback or open any dispute on paypal.