The forthcoming Apple Watch will be able to determine when users take it off and will lock down sensitive information accordingly.
As discerned by Cult of Mac during its hands-on with the wearable device, the watch’s army of sensors when notice when it leaves the wearers wrist.
Once it leaves contact with the body, the Apple Watch will automatically shut down access to the user’s credit card information.
The idea behind this nifty trick is to prevent thieves from wrenching the watch from an owners arm, or stealing it when not being worn, and using the device to run up a massive shopping bill.
Earlier on Thursday it was confirmed by Apple that the Watch will require “nightly charging” via the mag-safe adapter that clips to the back of the watch face.
Considering the watch will be coming off users wrists at least once it day, Apple has acted prudently by locking down payment information as soon as it is removed.
The sensors used to detect whether users are wearing the device are primarily designed to register the user’s heart rate in accordance with the fitness functionality within the Apple Watch.
Two of the sensors are infrared and light flows through the other two. Together they combine to determine blood flow beneath the skin.
The Apple Watch will go on sale in early 2015 in three editions from $349, although Apple is yet to confirm a firm release date or UK pricing.
Read more: Apple Watch: I want one, but do I need one