3.5 millimeters jack compatible with all phones, rechargeable and comes with a free USB chargerSimply plugin and switch on with three levels of brightnessUseful for clicking pictures at low light or no light and also can be used as a mini torchIt can be used as a simple flashlight or a small emergency lampImprove photo's quality when use camera in poor light situationBuilt-in Rechargeable battery and won't consume your device's batteryCompatible With iPhones, Smartphones & Tablets