<p><b>    Bike LED light is waterproof, safer in water fog when riding in the rain. Made you be seen and heard at night when riding, enables you a safer riding</b></p> <p><b>    Can be used for a wide range of activities: road biking, city commuting, hybrid bikes, adult bikes, mountain bikes,kids bikes. Keep your kid from danger by warning or noticing others. </b></p> <p><b>Feature：</b></p> <p></p> <ul> <li>4 sounds: This electric bike bell is equipped with a controller with 4 buttons, 1 button corresponds to 1 type of sound. When the alarm is on, the lights will light up at the same time.</li> <li>6 LEDs: Six LED lights blink alternately (red and green light), creating the shining appearance of this electric bike horn; there is an “ON/OFF” button behind the bike bell, and the continuous-flashing mode is ideal for night riding.</li> <li>Keep you Safe: This bike siren can quickly attract the attention of others through both sound and lighting, strengthens the warning effect and greatly improves the safety index of riding. Whether you are riding at night or on a rainy day, this cycle electric horn will escort you until you get home safely.</li> <li>MUST READ: There is a control key at the BOTTOM of TOTAL CONTROL BOX, when it's "ON" position, light brights all the time. When "OFF" position, light only brights when pressing the one of 4 buttons.</li> </ul> <p><b>Detail Specification:</b></p> <ul> <li>Material: High quality ABS plastic+Electronic components</li> <li>Size: 5.11 x 2.9 x 1.4 in. (13 x 7.5 x 3.5 cm).</li> <li>Powered: 2 x AA Batteries (Not included).</li> <li>Cable Length:10 in (26 cm).</li> <li>Sound:4 Loud Siren Sound.</li> <li>Led Color:Red & Blue. </li> <li>Fits for handlebar: 20-30 mm</li> </ul>