Fangrui Product Details Function: Waterproof, Anti-vibration, Anti-corrosion. The Outer Shell Is Made Of High Quality Material And Does Not Rust. Simple And Convenient Operation, Small Size, Buckle, Portable. Application Scope: Access Control System; Biometric And Identification System; Warehousing Logistics System; Security Patrol System; Hotel, Community Card System; Identification System Security Patrol, Sauna Bath Door Lock, Electronic Door Lock, Access Control Intercom, Bank, Communication, Railway Portation, Portation And Many Other Fields; Electronic Wallets, Smart Water And Electricity Meter Reading Systems And Many Other Industries. Memory:64bits. Chip:rw1990 Work Type: R/w And Encrypt Model: Rw1990 Ibutton Model Number: Rfid Key Tag Color:black Material:abs+stainless Steel Package Contents: 10 X Rw1990 Tm Key Card Only The Above Package Content, Other Products Are Not Included. Note: Light Shooting And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The