Specification Type: Contactless R/O or R/W Operating Frequency: LF(125KHz) or HF (13.56MHz) IC Available at 125KHz: EM4102, EM4100, EM4001, TK4100, GK4100 IC Available at 13.56MHz: I-CODE (ISO 15693-3), MF Ultralight (ISO 14443A), MF1K (ISO 14443A), MF4K (ISO 14443A), Tag-itâ?¢ HF-I (ISO 15693-3), others upon request Size: dia.65mm (chip:dia.25mm) / dia.74mm(chip:dia.30mm), thickness:7mm Reading Distance: 5~20cm (Depends on reader and IC type) Material: Silicone Operating Temperature: -40º C to +100º C Storage Temperature: -40º C to +120º C Competitive Advantage 1. Waterproof IP 68 2. Wristband Material: Silicone 3. Flexible & easy-to-wear 4. Read distance: Up to 20cm (Depends on reader and IC type) 5. 100, 000 times reading & writing 6. Storage temperature: -40 to 100 degrees C 7. Also Available: Custom colors, embossed logo