The Bluetooth Lock from Koogeek features a biometric fingerprint scanner that allows you to unlock your heavy padlock by simply pressing your finger on it. For voice control, it is even compatible with Siri. This device normally sells at Amazon for up to $55, although when entering 5M4ZDYPA promo code during checkout, you can get your fingers on one for just $39.19. That’s the lowest we’ve ever seen it reach, but it’s not going to last forever.

From securing your luggage or a gym locker to your toolbox, a bicycle, and much more, this lock can be used almost anywhere. It has a rechargeable 280mAh battery that can last on a single charge for up to a year, and you can see its battery level and charging status with the free Koogeek Home app, and you don’t have to wonder if it might go dead. Using Siri even allows you to use your voice to lock and unlock this device, and the Koogeek Home app also allows you to unlock it.

Nearly 70 customers at Amazon have left reviews for this device resulting in a 5-star rating of 4.1. To use this lock, you might want to add some sort of chain to your order.

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