Here is a smart gadget that turns your smartphone into a smart car key. KETO uses 2-channel authentication (Bluetooth & Soundwave) and lets you easily share access with friends or block it. With KETO, your car only starts when an authenticated mobile key is available.
More gadgets like this: here
You can access multiple cars with one KETO app. Its battery lasts 30 days on standby. It features Bluetooth 5.0 technology.
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