QOTSTEOS Electronic Deadbolt Door Lock, Smart Wireless Anti Theft Intelligence Remote Control Keyless Household Access System with 4 for Home/Hotel(Silver)

Durable and easy to install: long service life, made of zinc alloy stainless steel, durable and without fading. Easy and firm installation with the external mounting plate. The bottom panel design makes installation easier and more stable. Remote Control & Security: Remote controls with digital conversation system, it cannot be decoded or duplicated. Anti-theft and provides you with security. With 4 remote controls, you can place these keys in different places in the house, such as bedside table, coffee table, dining table, etc. wherever you like. Energy-saving control mode: low power consumption, 4 x AA batteries can withstand approx. 1 year of work provided (not included 4 x AA batteries). This intelligent lock has a long lifespan, 300,000 locking operations, no wear. Once the main batteries are exhausted, you can use the buffer battery without having to worry about empty batteries. Energy saving and backup battery: energy saving and low battery consumption. Before the main battery is empty, the lock will sound an alarm to remind you that it is time to replace the battery. Don't worry when the battery runs out, the backup battery will work to help you unlock it. Once the main batteries are empty, you can use the backup battery without worrying about an empty battery and being locked outside. Widely Application: An essential choice for family security. Ideal for office, home, hotel, anti-theft, hallway door, wooden door, garage door, etc.