What should I pay attention to when installing the seed phrase into the backup box?

Please install your recovery phrase away from others and cameras. Do not take photos. Do not read aloud. After installed, Store in a secure place, with a lock, to prevent others from viewing it.

Why I record only the first 4 letters of each mnemonic word? Is this safe?

Yes — it’s safe. The BIP39 standard uses a list of 2048 words where no two words share the same first four characters, so the first 4 letters unambiguously identify each word. Wallets can complete the full word from those four letters.

Why not just write my seed phrase on paper?

Paper can burn, tear, or be damaged by water. A metal backup provides stronger long-term protection.

How many mnemonic phrases can one HeirBOX S1 back up?

The imKey S1 features a double-sided design and can store two sets of recovery phrases (Side A and Side B can each hold one 12-word recovery phrase). Each slot can store 4 letter tiles, which is sufficient to cover all BIP39 standard word lengths.

How should I install recovery phrase words that contain only three letters?

Use a blank tile (included) for the fourth position. Three-letter words are already unique in the BIP39 list, so the blank simply completes the slot.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

HeirBOX S1 Crypto Seed Phrase Storage Metal Plate Backup Stainless Steel Fireproof Waterproof for 12/18/24 Word BIP39 Mnemonic Recovery Phrase Compatible with Ledger Trezor Bitcoin Cold Wallet

HeirBOX S1 Crypto Seed Phrase Storage Metal Plate Backup Stainless Steel Fireproof Waterproof for 12/18/24 Word BIP39 Mnemonic Recovery Phrase Compatible with Ledger Trezor Bitcoin Cold Wallet

Product ID: 559884140

Details

Brand
imKey
Colour
Silver
Included components
1 x HeirBOX S1
Item weight
0.4 Pounds
Lock type
Key
Material
Stainless

💧Fully waterproof & corrosion-proof

🔒Secure 6-screw locking system

🔥Fireproof up to 1398°C

€ 87.73

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

Description

🔐 Lock your crypto legacy in fireproof steel—because your seed phrase deserves bulletproof security.

COMPLETE DIY KIT - Includes metal plates, screwdriver, screws & instructions for fast, foolproof setup.
DUAL SIDED STORAGE POWER - Store two separate 12-word seed phrases on one device—perfect for multi-wallet pros.
PRECISION LASER ENGRAVING - Permanent, clear characters ensure flawless recovery with just the first 4 letters per word.
UNBREAKABLE CRYPTO SHIELD - 304 stainless steel withstands extreme heat & water for ultimate seed phrase protection.
OFFLINE COLD STORAGE SECURITY - 100% offline design eliminates hacking risks, compatible with all BIP39 wallets.

The imKey HeirBOX S1 is a premium stainless steel backup device designed to protect your BIP39 crypto seed phrases from fire, water, corrosion, and physical damage. Compatible with 12, 18, and 24-word phrases, it features laser-engraved characters, a secure 6-screw locking mechanism, and dual-sided storage for two wallets. Fully offline and compatible with major wallets like Ledger and Trezor, it offers a durable, tamper-proof cold storage solution for long-term crypto asset security.

Specifications

ASIN	B0BTM24566
Best Sellers Rank	471,110 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 948 in Cash & Check Boxes
Brand	imKey
Chamber Depth	0.24 Inches
Colour	Silver
Control Type	Key Control
Customer Reviews	4.6 4.6 out of 5 stars (118)
Included Components	1 x HeirBOX S1, 3 x metal letters plates, 1 x screwdriver, 6 x screws, 1 x instruction
Item Dimensions D x W x H	105D x 6W x 60H millimetres
Item Type Name	Cryptocurrency Seed Phrase Storage
Item Weight	0.4 Pounds
Lock Type	Key
Manufacturer	IMKEY Co., Ltd
Material	Stainless Steel
Model Number	HeirBOX S1
Mounting Type	Screw-mounted
Number of Items	1
Part Number	HeirBOX S1
Special Features	Fireproof, Waterproof
Unit Count	5.92 gram
Water Resistance Level	Waterproof

Common Questions

Are the products genuine and authentic?+

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.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

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

3 weeks ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 87.73

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews