desciption :Four switches control 4 tone of electronic horn
material : high quality abs plastic , electronic components
power supply : 2*AA battery (not include)
Mount ring suitable for 28-30mm pipes diameter installation
this is designed for bicycle simple and easy electric bicycle design 's & ldquo . electric horn + nightfaring before warning light & rdquo . the multifunctional products . life water-resistant design , in the rain outdoor use , convenient installation , function and very practical . outside the ride indespensible equipment oh !
total control box bottom a control key , dial to & ldquo . on & rdquo . this the position , lighting . is dial to " off " position , in the horn when , lighting bright .