Bike Chain Alarm Lock with Remote and 4 Digit Combination Vehicle Search Anti Theft Keyless Bicycle Lock for Luggage Motorcycle Item Type: Bike Chain Alarm Lock Material: ABS+Stainless Steel Lock Battery Type: AAA Battery (No Battery Included), with low power prompt function Lock Battery Quantity: 3 pcs Remote Control Battery Type: CR2032 Cell Battery (Built in Battery Included) Remote Control Battery Capacity: 350mah Default Password: 1234 Steel Chain Size: Diameter 6mm / 0.2in, Length 80cm / 31.5in Keyless Lock: Password or remote control to lock/unlock Multiple Alarm Function: Alarm immediately when vibration or movement of the lock body; Alarm immediately when cutting the steel rope or disassembling the lock body screws; Alarm immediately when entering the wrong password three times Alarm Sound: Above 115 decibels Password: 4 digit password, 256 password combinations Main Function: Remote control lock/unlock/find lock find vehicle/learn code, LED indication Water Resistant: IP44 water and dust resistant Working Temperature: -10℃ to +60℃ Multiple Lock Control: One remote control can simultaneously control multiple lock bodies or the same type of remote alarm Learn Code: A lock can learn up to 8 remote controls