Lock Smarter Not Harder with LINKA. Our bike lock features Tamper Alerts, Auto-Unlock, Built-in Siren, Keyless Access & more! With LINKA’s revolutionary patent-pending Auto-Unlock feature, you’ll never have to carry a key. As you approach your bike, LINKA will recognize you and unlock automatically. Quick, convenient, and easy. Bikes are stolen in broad daylight and thieves have become annoyingly bold. We gave LINKA a screeching 100 dB siren to ensure all eyes are on preying thieves, before they ever get away with your prized steed. With our sophisticated triple-axis accelerometer, we’ve even reduced the chances of false alarms by capturing the methods and movements of thieves compared to someone bumping your bike by accident.