Smart Fingerprint Padlock SMART & SAFE - NO APP, NO BLUETOOTH, NO KEY. SIMPLE & CONVENIENT - Record up to 10 different fingerprints, it is so simple to you and your family members. SECURITY & STURDY & PORTABLE - Zinc alloy metal body construction, small, light but sturdy. LONG STANDBY TIME & USB RECHARGEABLE - Can support 3 months standby time. IDEAL FOR - Luggage Lock, Smart Bio-metric Lock for Anti-Theft Gym Lock Door Backpack Luggage Suitcase Bike Office Indoor or Outdoor Use.