Rewritable Writable Rewrite Duplicate Rfid Tag Can Copy Card. Features: Compatible with All Door Entry System Easy to Carry Water Resistant Can Read and Rewrite Each Comes with Key Ring Included Compatible with All RFID Reader to Gain Access No External Power Required. It Applies to Access Control, Hotel Locks, Staff Attendance and School Campus Access and Payment Control, Identification and Security Systems, Parking Lot Entry and Payment, Social Security Management, Transportation Payment, Municipal and Ancillary Service Payment Specifications: Certification: CE Chip: EM4305/T5577 Proximity Distance: 2-10cm Material: ABS Frequency: 125khz Technology: Engraved Code Can Copy EM4100 125khz Card Proximity Token Keyfobs Weight: 47g (10pcs Material: ABS Operation Frequency: 125Khz Detecting Distance: 3-10cm Pcs: 10/lot . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.