Amazon has the ELAMOR Keyless Entry Smart Lock for $39.99, which is 50% off its original price $79.99.

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This smart lock with a touchscreen keypad offers keyless entry for up to 50 user codes, making it ideal for homes, apartments, and offices.

• Equipped with an ultra-responsive touchscreen and 2 spare keys
• Features a secure and solid deadbolt made from sturdy zinc alloy and stainless steel
• Comes with an auto lock feature that can be customized between 5 to 30 seconds
• Can be installed easily and is compatible with right-handed or left-handed doors