Ideal for use in electronics, pharmaceuticals, and other moisture-sensitive industries, our humidity indicator card provides reliable and immediate feedback on humidity levels. Its portable design allows for versatile use in various settings, from storage containers to shipping packages, ensuring your products remain in optimal condition.Features - Color: Multi - Material: Absorbent paper - Size: 10.50 x 4.00 x 0.10 cm / 4.13 x 1.57 x 0.04 in - Accurate environmental readings: displays accurate humidity levels, enabling users to make timely adjustments to humidity control - Fast response: the card swiftly changes color upon exposure to moisture, offering a clear visual indication of humidity changes - Durable and reusable: designed to return to its original color after drying, allowing for repeated use - Portable and convenient: its small size allows for easy placement in any area requiring humidity monitoring - Applicable in various settings: practical for homes, offices, warehouses, and laboratories, providing effective humidity tracking Package list: 20 x humidity indicator cards