Features 1、Made with premium ABS material for light weight and maximum durability. 2、Stable and secure data transmission, very easy and convenient to use. 3、RFID cards, each RFID has a separate ID. 4、Each comes with key ring included. 5、Waterproof design, high quality, good reliability. Specification Features: Made with premium ABS material for light weight and maximum durability. Stable and secure data transmission, very easy and convenient to use. RFID cards, each RFID has a separate ID. Each comes with key ring included. Waterproof design, high quality, good reliability. Specification: Condition: 100% Brand New Material: ABS Color: Blue Frequency: 125 kHz Chip type: EM4100, tk4100 Operating temperature: -40°C - 85°C Size: 3.3*0.4cm/1.3*0.2in Applications: fit for public transportation, parking, identification, time and attendance systems, booking, payment cards, product identification, etc. Note: This card is only used for card reading, not for card writing. Package List: 100 * RFID Card