... :30g LED: 0.5 W high brightness LEDFuntion:: TF card reader and flashlight; blue led light or flash when Insert ... 1. Patrol, emergency……Convenient and safety 2. Night reading, ooking for lost items 3. Nightclubs,party,concerts,it brings carnival atmosphere ... the usb interface of the flashlight, TF card, SD card, flash card, memory card, all card reader led flashlightthen plugs into the computer's usb ...