Model: 167 - Quantity: 1 - Color: Blue - Material: ABS - Water resistant and lock control switch - 120dB high loudness alarm - Long time use for low power consumption - Easy installation and operation - High sensitive alarm - Alarm method: Vibration (110dB alarms) - Product inner diameter: 3.2~3.5cm - Rainproof after correct installation - Powered by 1 x 9V battery (included) - Inserted key to the end of clockwise direction 20s enter in alarm status - Suitable for motorcycle and bicycle use - Can NOT replacement your bicycle lock. - Packing list: - 1 x Lock - 2 x Keys - 2 x Screws