1.good quality 2.mulifunction ,not only a keychain ,but also ... Red Laser + 1 White LED + 1 UV LED (default)SwitchButton on/offBattery3*AG13(included, replaceable)Size15(Dia.)x68(H)MMPacking24pc/Display box, 240pcs ... /CTN, 56x35x45CM, NW:14Kgs, GW:16KgsFlash modeLight upMOQ5000 pc(s) 3 In 1 Laser UV Keychain