TRUSTECH RFID Tag Key Fob Keyfobs Keychain Ring Token 125Khz Proximity ID Card - 5PCS Electronic Components Electronic Hobby Kit

Description - the 125khz rfid tag - key fob are considered passive tags. Each of these have a unique id, so multiple tags can be used in a single project and may be purchased in any quantity. Features - works with most common rfid card reader (serial and usb). Em4100 family passive tags. Activating frequency: 125 khz. Readable from 2 to 5 inches of rfid reader. Rohs compliant. Keychain tag for attachment.||Em4100 family passive tags;Works with most common rfid card reader (serial and usb);Each of these have a unique id, so multiple tags can be used in a single project