Feature: high precision finerglass circuit board heat radiating Aluminum stable input current protects the circuit , provides a longer lifespan Specification: Lifespan: 30000 working hours Voltage: DC9V-24V Socket: T15,w16w.921 912 LED Source: 15X SMD 2835 newest bead LED Quantity: 15pcs Color: white(6000k) Size: as the picture Cross Reference：T15,W16W,904 904LL 904NA 906 906LL 906NA 912 912LL 916 916LL 916NA 916NALL 917 917LL 920 920LL 921 921ST 921LL 921K 922,etc. Application: back up reverse light Package : 2x AUXITO T15 921 led lights bulbs .