5 LED for safe tail light. Totally 6 LED for left and right turn signal. 3 LED for indication light. Turn signal. Brake lights. 100,000 hours LED life. Eight pieces music horn, the horn sounds while turning. Comes with all the mounting accessories. Powered by 2*AA Battery (Not Included). Note: This brand new LED Bicycle Indication light has 8 models, so you need switch for 8 times to turn the light off.