Lock smarter not harder with LINKA. This 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. The team has given LINKA a screeching 100 dB siren to ensure all eyes are on preying thieves before they ever get away with your prized steed. With their sophisticated triple-axis accelerometer, they’ve even reduced the chances of false alarms by capturing the methods and movements of thieves compared to someone bumping your bike by accident.