1. Multiple Unlocking Methods: 3 convenient and fast unlocking methods: TTLock APP, fingerprint, and emergency mechanical key. Supports fast unlocking of semiconductor fingerprint recognition, remote unlocking of mobile phone Bluetooth-compatible connection TTLock APP, and emergency mechanical key unlocking (in case of device malfunction or power outage) 2. High Quality Material: High quality zinc alloy lock head with sturdy structure to prevent illegal unlocking. Strong load-bearing capacity; Thickening and hardening, locking design to prevent external damage from others 3. Domestic Waterproofing: IP67 grade waterproofing, fearless of wind and rain outdoors. IP67 level protection, zinc alloy lock head, not easy to rust, preventing rainwater and dust from entering the lock body, fearless of wind and rain; The fingerprint is equipped with a sliding dust cover to prevent dust and rainwater from entering 4. Long Battery Life: Type-C emergency charging port, when you use it, prompts for insufficient battery charging, providing emergency power supply ; Built in rechargeable lithium battery, Low-power electronics, intelligent power saving, extended battery life Unlock method: fingerprint, TTLOCK APP, key User capacity: 50 sets of fingerprints Waterproof grade: IP67 Power interface: Type-C Charging method: rechargeable battery Unlock time: less than equal 2 seconds Working temperature: -20-70 degrees Celsius Working humidity: 0% -90% RH without condensation Support for mobile system: Android 4.3/for IOS 7.0 or above Attention: Remember to charge it first after receiving it. Be sure to keep the spare key by your side or outdoors, and be sure to keep it safe just in case. Color:Black Material:A3 Steel + Zinc Alloy Package Contents: 1 * fingerprint lock 2 * keys 1 * charging cable 1 * Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.