NEW Feature:Connect headlamp to USB power socket directly for indoor lightingUse the lamp with power bankUse the lamp with battery packconnect headlamp to USB port of Computer for indoor usingCharge the battery pack with USB cableCharge the Battery pack with power bankCharge the battery pack via computerCharge Battery pack via USB port in the carSpecification1. LED bead will produce much heat during. And heat will be dissipated via the aluminum casing. Please be careful and not to be scalded.2. DO NOT shoot directly into eyes with the lamp，for strong light will do harm to eyes. even cause temporary blindness.3. The lamp is powered by 3V-5V power supply，for example 4.2V battery pack，power bank ect.4. Four working modes available:High mode -100% brightness，medium mode -50% brightness，low mode -25% brightness，strobe mode -100% brightness.5. Press on/off button to change between lighting modes. A long press on button can change the lamp to strobe lighting in any mode.Product Parameters:Brand: GAGZZiLED Bead: CREE XM-L2Shell: Aluminum AlloyColor temp: 7000KReflector: Aluminum MirrorLumens:1200LMLighting Distance: 300MVoltage:2.7V-5VWorking time: 5-15HoureCurrent:0.3A-2ABattery capacity:4400mAhApplications: Bicycle light，headlight，Portable lamp，Lndoor lightPackage Included:1x Headlamp1x Mount clip1x Headband1x USB Charger Cable1x Battery Pack1x Storage Bag