Chip manufacturer: BCM Chip: TOPAZ512 Chip Type: NFC Forum Hom 1 Tag Executive Standard: ISO 14443A Frequency: 13.56MHz Capacity: 480bytes Times of erasures: 10,000 times Data retention: 5 years Locked: can Password: None Reading distance: ≥3cm Working temperature: -20℃~+55℃ (av noo 90%) Khoom siv: white PVC Size: 85.6×54×0.86mm, can be customized