MA
0.8 ft wide, 4-digit
Portable personal safe with set-your-own 4-digit combination and a cable to secure it to a fixed object; interior about 1 inch tall
The Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) ($17.97) is worth considering with a 6.2/10 consensus score across 1 expert reviews. Experts highlight includes a cable to wrap around a bed frame or fixed object — the anchoring point of a $18 box and set-your-own 4-digit combination, so there is no key to lose in a shared room. Manufacturer — Portable personal safe with set-your-own 4-digit combination and a cable to secu... Best for: Phone / wallet / cards, Tethering to a bed frame, Cheapest possible deterrent.
Good Value1 Expert Reviews
Price Range
Check Price on Amazon →$17.97
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Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination)
dorm-safes
DGH ScoreAverage
DormGearHQ proprietary rating
5.3/10
1 expert sources
Dorm-Policy Fit5/10
Setup Ease4.6/10
Reliability4.6/10
Value Rating7.2/10
Twin XL & Small-Space Fit5/10
The Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) earns a DGH Score of 5.3/10, driven by strong value (7.2/10) with room to improve in reliability (4.6/10). Based on 1 expert sources and DormGearHQ compatibility analysis.
How we calculate the DGH Score →Expert Consensus: 6.2/10 across 1 sources
Last verified:Key Features
- ✓ Cable tether included
- ✓ Set-your-own combination
- ✓ Shock-absorbing foam
- ✓ Charge-cable port
- ✓ Under $18
Best For
Phone / wallet / cardsTethering to a bed frameCheapest possible deterrent
What Experts Agree On
What Experts Love
- ✓ Includes a cable to wrap around a bed frame or fixed object — the anchoring point of a $18 box
- ✓ Set-your-own 4-digit combination, so there is no key to lose in a shared room
- ✓ Shock-absorbing foam and a charge-cable access port for a phone or earbuds inside
Common Criticisms
- ✗ This is a tether box, not a safe — a 1-inch-tall interior holds only a phone, wallet, and cards
- ✗ No independent lab test; treat it as a grab-and-go deterrent, nothing more
- ✗ The combination dial is far easier to defeat than the keypad or biometric picks above
What The Experts Say
Ready to buy the Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination)?
Check Price on Amazon$17.97 · 1 expert sources · 6.2/10 consensus
Frequently Asked Questions
Is the Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) worth it?
Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) earns a 6.2/10 consensus score across our 12 expert sources. It is rated "Good Value" — Phone / wallet / cards. At $17.97, Portable personal safe with set-your-own 4-digit combination and a cable to secure it to a fixed object; interior about ...
Who is the Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) best for?
Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) is best for: Phone / wallet / cards, Tethering to a bed frame, Cheapest possible deterrent. Experts rate it "Good Value" overall.
How does the Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) compare to other Security & Privacy options?
Among the Security & Privacy products we have reviewed, Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) ranks below average with a 6.2/10 score. See our full category comparison for more details.
What smart home systems does the Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) work with?
Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) works with major smart home platforms. Check our compatibility notes on the product page for any setup requirements or hub dependencies.
What are the pros and cons of the Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination)?
The main pros of the Master Lock 5900D Portable Personal Safe Lock Box (Set-Your-Own Combination) are includes a cable to wrap around a bed frame or fixed object — the anchoring point of a $18 box and set-your-own 4-digit combination, so there is no key to lose in a shared room. The main downside is this is a tether box, not a safe — a 1-inch-tall interior holds only a phone, wallet, and cards. Overall, experts rate it "Good Value" with a 6.2/10 consensus score.
Affiliate disclosure: DormGearHQ.com participates in the Amazon Associates program. We earn a commission from qualifying purchases at no extra cost to you. This consensus review is based on 1 independent expert reviews — we did not test this product ourselves. Always verify current prices and availability before purchasing.