Details for the headlight: 1.Color:Orange rubber, black body 2.Material:Hard anodized aluminum alloy 3.Lamp:Super bright with real Cree q3 LED manufacture in use. Brightness: max around 200 lumens and distance range up to 500 feet 4.Switch:Sideward push button switch 5.Length:12cm 6.Power supports: USB charging 3.7V 1200mah li-ion battery. A rechargeable battery included in the package is just for a testing use. It may fail to work after a long term store out of 4 months. Please buy a new one for its change. 7.Function:Steady-flashing-off. 8.Headlight run time: Steady 1.5 Hours, flash 4 hours, USB charging time: 4 hours. 9.Headlight batteries life time: About 700 charges, 2 years normal usage 10.Weight:88g . Details for the gift taillight: 1.0.5w LED (4 lumens) supported by li-ion battery, USB rechargeable 2.Function: Steady- flashing-off, 3.Lamp:Red LED , 4.Run time: 1.5 Hours. 5.Usb charging time: 3 hours. 6.Weight:32g . Packing list: 1.1Xusb cable 2.1X USB rechargeable meet locks brand headlight with mounting bracket 3.1X3.7V 1200mah li-ion 18650 rechargeable batteries 4.1Xusb rechargeable taillight 5.1Xuser instruction 6.1X meet locks service card . 1.Do not let the battery fully discharge as it may cause damage to the battery 2.The testing battery included may fail to work, due to long term store. Please buy a new one in high quality to replace it if needed.