Double LED Light, Double Safe] - You'll never be afraid of darkness. Our alarm keychain designed with 2 LED Lights, it can illuminate your way home. When you come home late, it will be your most loyal partner.[Real Tested 130db Loud Sound] - Its super loud sound can be heard from 300 yards away so as to attract the attention of others and save you from danger. This emergency alarm's sound can last about 1 hour.[USB Rechargeable] - You do nt have to worry about running out of batteries anymore. You do nt need to change the battery frequently. Our latest alarm is equipped with a USB charging cable. You can charge it at any time. Charging time is only 40 minutes, standby time can be up to one year, charging indicator lights red, charging indicator lights green.[The Best Gift Choice] - Whether it s for your family: the elderly, children, men, women; school gifts, housewarming gifts, Christmas gifts, and other occasions, whether it s a practical siren defense tool or a small pendant item in history, This will be your best gift choice