supply of dc-dc power convertor.dc-dc power convertor.,dc-dc power convertor (110v to 27.4v) to sanrok part no. 2ed-255-2000 [ warranty p eriod: 30 months after the date of delivery ] ] , 7ah, 12v vlra batteries sanrok part no. 2ed-255-2001 [ warranty period: 30 months af ter the date of delivery ] ] , brake module sanrok part no.- 2ed-254-4387 [ warranty period: 30 months after the dat e of delivery ] ] , strobe light with hooter sanrok part no. 2ed-254-1939 [ warranty period: 30 months after the date of delivery ] ] , electronic voice message sounder sanrok part no.- 2ed-254-1940 [ warranty period: 30 months after the date of delivery ] ] , public announcement module (pa module) sanrok part no. - 2ed-255-1998 [ warranty period: 30 months after the date of delivery ] ] , charging unit sanrok part no.- 2ed-254-3523 [ warranty period: 30 months after the da te of delivery ] ]