Keyless Bluetooth App Intelligent Bike Lock, Qr Code Access. Features: Last Unlocked Location/Time Can Be Checked Unlock History Can Be Checked by APP Share Unlock Key with Family & Friends Waterproof / Shake-proof / Anti-Rust Inner Chip: Low Power Consumption Lock is Controlled by Mobile Phone APP, Unlock Key Can Be Shared by Administrator to Other User, Advance is All of Users Should Download APP. Specifications; Color: Black Material: Aluminum Alloy & PC Battery: CR14250 Lithium Battery, 2 X 2700mAh, Non-rechargeable Working Temp.: -10 Degree C to 80 Degree C Waterproof: IP65 Working Humidity: 5% to 95% RH Non-condensing Working Current: 50mA Standby Current: 0.5mA Multiple Functions: Records / GPS Tracker Unlocking Mode: Bluetooth APP / Scanning QR Code Unlocking Time: 1 Second Working Voltage: 3.6V APP Support: IOS and Android 4.4 or Above APP Language: Chinese / English Model Number: KP-LK0065 Unlocking Way: Bluetooth APP Material: Aluminum Alloy + PC Power Supply: Lithium Battery Package Included; 1 * Smart Bicycle Lock . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.