What does "can be reused 20x" mean if they don't require recharging?

Yes sometimes you don't need to recharge it. Rainy days go to pink, sunny days go to blue again. If you change humidity level lower, they can go back to blue again. You can use hair dryer or sunlight to lower humidity level. Thank you.

What country are these manufactured in?

They are manufactured in South Korea.

Are they safe to use in food containers?

No they are not safe for food. Thank you.

Hi, are these cobalt-dichloride or cobalt-chloride free? when do they expire?

Blue to pink humidity indicator cards contain cobalt chloride. There's no expiration date on humidity indicator cards. As long as you keep them in tight sealed container with silica gel packet, they will last for long time. Humidity indicator cards are sensitive to temperature, humidity, atmospheric pressure, and wind. Therefore, they do not work well in open air. They work well and display accurate relative humidity level in enclosed space. The humidity card itself is reusable. When the humidity level is high, the dots will change from blue to pink and when the humidity level is low, the dots will change from pink to blue again. With long use, the color of the dots may fade away. Then, you can replace the card. We do carry cobalt free humidity indicator cards (green to purple). You type ASIN B01DYOR0WY in Amazon search bar. Color change is not as clear as blue to pink (cobalt chloride) cards. Thank you.

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Dry & Dry Premium Humidity Indicator Cards (12 Cards) - 10-60% 6 Spot(Reusable)

Dry & Dry Premium Humidity Indicator Cards (12 Cards) - 10-60% 6 Spot(Reusable)

Product ID: 167108032

Details

Battery description
No batteries
Brand
Dry & Dry
Colour
blue
Item weight
0.02 Kilograms
Mounting type
Tabletop

🎯6 precise humidity spots (10-60%)

📏Accurate enclosed space measurement

🔄Reusable 20+ times

¥5586

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔍 Monitor moisture like a pro—never miss a beat with Dry & Dry!

INSTANT VISUAL ALERTS - Clear blue-to-pink color shifts keep you instantly informed of humidity changes.
DESIGNED FOR PRECISION - Calibrates within 30 minutes for reliable readings in enclosed spaces.
STAY AHEAD OF MOISTURE - 6 distinct humidity levels from 10% to 60% for pinpoint environmental control.
TRUSTED INDUSTRY STANDARD - Highest quality, rigorously tested for consistent, professional-grade performance.
ECO SMART COST EFFECTIVE - Reusable over 20 times—cut waste without sacrificing accuracy.

Dry & Dry Premium Humidity Indicator Cards offer 12 reusable cards that accurately track relative humidity from 10% to 60% using 6 color-changing spots. Designed for enclosed environments, these cards provide clear blue-to-pink visual alerts and can be reused over 20 times, making them an eco-friendly and reliable solution for professionals managing sensitive goods or environments.

Specifications

ASIN	B07D7LSZZP
Battery Description	No batteries needed
Best Sellers Rank	297,118 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 4,926 in Blank Greeting Cards
Brand	Dry & Dry
Colour	blue
Customer Reviews	4.1 4.1 out of 5 stars (130)
Item Weight	0.02 Kilograms
Manufacturer	Dry & Dry
Manufacturer Part Number	DDHUMID20PK-6 DOT
Model Number	DDINCCRD10
Mounting Type	Tabletop
Number of Items	12
Operating Humidity	10-60%
Temperature Accuracy	2
UPC	712396969211
Unit Count	12.0 count
Upper Temperature Rating	30 Degrees Celsius

Common Questions

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

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¥5586

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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