Thank you for viewing. It is unused, only opened to check the contents. The SwitchBot Smart Lock Ultra is a convenient device that can be easily operated with an app. - Brand: SwitchBot - Model: Lock Ultra - Function: Smart Lock - Control Method: App Product Dimensions (Length x Width x Height) 12.2 x 6.3 x 6.7 cm Color: Black Included Components: Lock Ultra body, instruction manual Connection Protocol: Wi-Fi 【Ultra Design - Integrated design that blends into the door】The "integrated cover design" completely covers the thumb turn and height adjustment plate, eliminating the sense of incongruity unique to retrofitting and improving operational stability. In addition, we have prepared interchangeable "dress-up stickers" in three colors: light brown, brown, and dark brown, to match wooden doors. It uses aluminum alloy, also used in aircraft, and is resistant to scratches and impacts. Furthermore, the "Quick Key" has been upgraded! Even when your hands are full, you can unlock the door by lightly touching it with your elbow. The magnetic battery cover makes it even more convenient to replace the battery. 【Ultra Power - Triple power supply system eliminates the risk of being locked out】In addition to the large-capacity "main battery" that can be used for one year on a single charge, there is a CR123A lithium battery with a battery life of about 5 years and can perform up to 1,000 emergency unlocks, and a microcurrent unlocking function that collects the small amount of electricity remaining in the battery and turns it into a "lifeline in an emergency." By equipping a triple power supply system, the risk of being locked out due to a dead battery is completely eliminated. Even while the main battery is charging or in extreme cold of -20°C or below, you can unlock the door as usual with the spare battery, and even if you forget to charge the main battery or replace the spare battery, the microcurrent unlocking technology allows for up to 5 emergency unlocks. 【Ultra Experience - Unlocking is faster and quieter】With a complete upgrade of the motor, the unlocking speed is 78.6% faster, and the motor's rotational power is 50% higher (compared to Lock Pro), eliminating the waiting time to unlock the door at the entrance. With the device always connected, you can smoothly unlock the door the moment you stand in front of it, without waiting for connection or response.