Waterproof Rewritable RFID Silicone Wristband 13.56MHz 1K Chip for Pool Access & Event Management, ISO14443A. Rewritable 1K Memory: 1KB storage with password protection supports over 100,000 read/write cycles. IP67 Waterproof Rating: Submersible in 1 meter of water for 30 minutes without leakage. Customizable Color: Available in blue, red, white, black, green, yellow, orange, gray, and pink per PMS. Multiple Printing Options: Supports silk screen, laser engraving, UV printing, embossing, and heat transfer. Wide Frequency Support: Compatible with LF 125kHz, HF 13.56MHz, and UHF 860-960MHz chips. Adjustable Wrist Size: Fits wrist circumferences from 180mm to 250mm with adjustable buckle. ISO 14443A Standard: High compatibility with ISO/IEC 14443A standard readers.