Review: Adel 3398 Biometric Fingerprint Keyless Door Lock

adel-3398Summary: The Adel 3398 biometric fingerprint keyless door lock is well built and recognizes fingerprints fast, but is not very accurate. I recommend the Samsung SHS-P718 LBK/LMK lock instead. It’s more reliable and it comes with many extra security features.


  • Fast fingerprint recognition
  • Sturdy and well made
  • Easy to install


  • The fingerprint recognition is not very accurate
  • The secret code is too long (11 digits)
  • The beeping sound of the lock is too loud
  • Installation and operating instructions are poorly written


  • 3 Ways to Unlock: fingerprint, code/password, mechanical key
  • Guest Password- for friends and relatives
  • Supports up to 120 users
  • TL Listed Latch – durable and made to last long
  • Adjustable Handle Direction – the handle can be installed either to the left or right
  • Low Battery Indicator – you will receive a notification whenever your battery is running low
  • 9 W Battery Probe – in case the lock fails you can use a battery to open the door

Is This Biometric Lock Right For You?

The Adel 3398 biometric fingerprint keyless door lock can be used at a main entrance door, storage room or office.


  • 2 x Keys
  • 2 x Key Cylinder
  • 3 x Accessories
  • 1 x Screw Pack
  • 1 x Installing Manual
  • 1 x Operating Manual
  • 1 x Combination Hammer/Hand drill
  • 1 x Screwdriver
  • 1 x Drill
  • 1 x Rasped

Installation & Usage Tips

The lock is guaranteed to fit almost any door. There is no wiring required, only a screwdriver.


  • Body Material: Zinc Alloy
  • Body Color: Sliver
  • Fingerprint matching time: < 1sec
  • False rejection rate (FRR): < 1%
  • False accept rate (FAR) : ≤ 0.0001%
  • Operation humidity: RH (45 ~ 85) %
  • Fingerprint collect time: < 2sec
  • Accept finger angle: 0 to 360
  • Storage capacity: 120 fingerprints
  • Working temperature: -10 to 55 C
  • Battery life: 2 years
  • Fingerprint template setting: 2 times generate a module

Bottom Line

The Adel 3398 biometric fingerprint lock is very fast in reading fingerprints but is not so accurate. In some cases, you need several tries in order to get the system to recognize your fingerprints. Also, the beeping of the lock is a little loud and irritating. TheSamsung SHS-P718 LBK/LMK is a better choice, it’s accurate, it has a better design and comes with extra features.

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