MobFest Multi-Purpose 110dB Siren Alarm / Motion Sensor Activated/Padlock Bicycle Lock

Features: Low false alarm rate. Low power consumption. Corrosion resistant, waterproof and durable to use. Powered by six button batteries. Supplied with three keys, convenient to use. Note: When you place the shackle with groove into lock near key port, then the lock comes into alarming state. When the shackle with groove is placed away from key port, the lock is just in the mechanical lock state. Specifications: Color: black Material: zinc alloy Alarm decibel: 120dB Power supplied by: 6 * AG13 button batteries Lock size: 7 * 3.3 * 9.8cm/ 2.7 * 1.3 * 3.8in Lock weight: 313g/ 11oz Package size: 17 * 13.5 * 4.2cm/ 6.7 * 5.3 * 1.6in Package weight: 374g/ 13.2oz