LONG BATTERY LIFE: The electronic door lock is low power consumption ensuring long battery life, don't need to replace the battery in 1 year. And it will remind you when the battery is low. Even if it runs out of battery, you can use a power bank for emergency power.
EXCELLENT CUSTOMER SUPPORT: eLinkSmart provides a 12-month Free Trial time and free lifetime technical support, hassle-free to get a replacement or refund in 12 months. And welcome to contact us if you have any queries.