1.used for motorcycle, e-bike, door 2.Patent:02237223.7 3.CE&ROHS 4.110db, ... .: LK355 alarm padlock , Patent: 02237223.7Can be used on: Motorcycle, electric bike,Door , etcLock Features:105-110 db alarm soundAuto-alarming system ... -6.2/pcs , MOQ :500PCSPayment term : T/T (30% deposit and 70% before shippment)sample(western union) Alarm padlock for electric bike