Protect your bicycle from crafty thefts with our SD-603 Bicycle Safety Strong Loud Air Alarm Bell Sound Bell Horns Electronic Bike Bicycle Handlebar Ring Bell! It utilizes vibration sensor for detection. When certain vibration is detected、 it will instantly produce super loud alert sound that can be heard long distance away for 15 seconds to scare the thief away. With a convenient clip mount、 it easily installs to the bicycle handlebar. Solid casing is durable for long-lasting use. Don&acute;t hesitate to get one!                                    <p>Features</p>            <ul><li> Protect your bicycle from crafty thefts</li><li> One key control、 easily install and compatible with all bikes including road bikes</li><li> Security surveillance: if the bicycle is shaking、 the horn will sound an alarm for 15 seconds</li><li> Waterproof、 ultra-loud & clear sound</li><li> Easy and safe to use when braking</li><li> Perfect choice for your riding  </li></ul>                                                            <p>Specifications</p>            <table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td width="131"> Color</td><td width="365"> Black</td></tr><tr><td width="131"> Material</td><td width="365"> Plastic</td></tr><tr><td width="131"> Dimension</td><td width="365"> (2.36 x 1.57 x 1.57)" / (6 x 4 x 4.5)cm (L x W x H)</td></tr><tr><td width="131"> Battery Requires</td><td width="365"> 4x LR44 Batteries</td></tr><tr><td width="131"> Weight</td><td width="365"> 2.26 oz / 64 g   </td></tr></tbody> </table>                                                            <p>Package Includes</p>            <ul><li>1 x Alarm</li><li>2 x Ties </li></ul>