BIKE INDICATOR LIGHTS, REAR BRAKE LIGHT & MULTI SOUND SIREN REAR CARRIER MOUNTINGA verynovel multifunction funitem , rather than aserious piece of hi tech equipment ( hence the very low price )MULTI TONE SIREN HORN , INDICATORS AND A REAR BRAKE LIGHT ALL IN ONEA FUN ITEM FOR CHILDRENS CYCLES OR ADULT BIKESEIGHT DIFFERENT TONES FOR HORN AND INDICATORLEFT/RIGHT 3 LED INDICATOR LIGHTS THAT FIT ON TO THE SEAT POST ( SO YOUCANNOT FIT THESE ON A BIKE WITH THE SEAT AT ITS LOWEST POINT)LED CENTRE LIGHT2 BRAKE LED LIGHT WHEN REAR BRAKE OPERATEDPLUS 6 DIFFERENT FLASHING LIGHT LEDUSES 2 AA BATTERIES NOT SUPPLIED ( BUT YOU WILL GET A PAIR OF ECONOMIC BATTERIES FREE OF CHARGE TO GET YOU STARTED )SIREN WITH BUILT IN INDICATOR SWITCH FITS ON TO STANDARD 22.2mm HANDLEBARSREAR BRAKE LIGHT / INDICATOR FITS AROUND THE SEAT POST , BRACKET FITS SEAT STEMS FROM 25mm up to 27.2mm

PLEASE NOTE : If you are looking for a great fun item buy this but if you are looking for a high tech item do not buy .