The flashlight is cool. The size is quite large, so Xs, is it worth hanging on the keys. Coating soft-touch plastic. Turns on and off by turning the head to click. Yusb for charging is behind, the cover is tight, opens with a turn counterclockwise. It shines quite brightly, for its size, but very cold light, almost blue, and too narrow a stain. But in general, a normal keychain, you can take.