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! Please Note: dear Friend,this glass tag very small and Special, maybe some of RFID Readers can't sensor it or not have the good distance,before you make the big order, you can bid the 2pcs/lot list for test ,after received your order I will test one by one,make sure they are all 100% working fine,I'm sorry the sensor problem! when you bid the item down I think you was agreed this.thanks for your kind understand! Hi,this item is writable RFID,not the HID item. Specifications: This is the 134.2KHz EM4305 Glass RFID Writeable tags Proximity Induction For animal identification. FEATURES: Most of tag very small so difficult to read,but this item ANT is special design,the sensor will better. Operation frequency: 134.2KHz. Chip:EM4305,is writeable chip,only support 134.2KHz EM4305 copier or 134.2KHz EM4305 writer. Detecting distance: 0-5cm(if the Reader Different so the Read Distance will Different ) Size:2.12 x12mm Frequency: 134.2KHz Protocol Support: ISO11785, FDX-B Chip Type: EM4305(R/W) Memory: 512bits Size: ?2.12 x 12mm Operating Temperature: -25C - +85C Storage Temperature: -40C - +90C Peak Temperature: +120C (100hours) , +140C (10hours) Housing Material: BIO Glass Chemicaland EnvironmentalResistances: IP68 (1m, 24hours), saltwater?alcohol?HCL?fuel?ammonia Mechanical Resistances: shock IEC 68.2.29 Memory Retention: 20years Weight: 0.1g Page included: 5pcs 134.2KHz EM4305 Writeable Glass RFID TAGS 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.