MagicShine MJ-818 LED Bike Tail light (Battery and Charger are not included), O-rings, Y cable and Extension Cable This LED tail light could be used with MagicShine head light package and share the same battery. 3W red LED + 9SMD red LED, Max 85 lumens 3 operation mode including 2 strobe mode 1 Y cable, 1 Extension cable, and 3 O-rings are included. Battery and charger are not included in this package.