... one bicycle light, one special 4* 18650 battery,one PU PVC battery bag, one battery bag cushion, one special charger, one 360 degrees ... 1 x Adjustable headband2 x Rubber ring for installation1 x Battery Pack1 x Charger (100v-240v)Application function:Special work required ... produce and cause danger.Do not mismatch other battery.The produce with a battery indicator light, when blue means normal status, ...