Feature:1. Two ways to unlock, including touch unlock and remote control unlock. There are 4 remote controls in the list.2. The invisible remote control lock is specially designed for family safety. There is no key hole outside, which is more secure.3. Dual circuit, high performance, fast identification, powered by 2 x AA dry batteries (not included).4. The tiger lock method has high security and is suitable for all types of doors, such as wooden doors, glass doors, metal doors, etc.5. The lock body is made of zinc alloy shell material, which is sturdy and durable, maximizing durability.Specification:Item Type: Invisible Lock Material: Zinc Alloy#Remote Control Main Lock:Frequency: 433Mhz (50Khz)Remote Control Range: Approx. 0.5-15 meters/1.6-49.2ftWorking Environment: -10-60, 5-60%Power Supply: 2 x AA batteries (not included)Battery Life: 20 times a day, about 6 monthsUnlock Mode: Remote control unlocking/touch unlockingSize: Approx. 155 x 80 x 35mm/6.1 x 3.1 x 1.4in#Remote ControlStandard Quantity: 4The Maximum Number of Remote Control: Up to 20 can be registeredRemote Control Range: Approx. 0.5-15 meters/1.6-49.2ftWorking Humidity: 5-60%Power Supply: 1 x CR2032 button battery, 100mAh (built-in battery)Battery Life: It is recommended to replace it every 6 monthsTransmission Mode: Frequency conversion signal every time to prevent duplication.Package List:1 x Remote Control Lock4 x Remote Control1 x Lock Box Bracket 1 x Fixer 1 x Mounting Accessory Kit1 x USB Cable3 x Adhesive Tape1 x English Manual