Protocol: ISO 18000-6C Chip: Alien H3( customized optional) Frequency: 860? 960MHZ Memory: 94 bits Dimension: 55* 53MM and diameter 30mm Work mode: R/ W Storage time: 5 Years Reading distance: 0-3meters( based on reader) Material: Import TPU Operation Temp: -30 C to 85 C Storage Temp: -40 C to 125 C