Features 4 Buttons: The remote control has two sets of buttons, including 2 regular buttons and 2 spare buttons, user-friendly design, safer to use. Sliding Cover: The remote control is designed with a sliding cover to prevent accidental pressing, and it is dustproof and waterproof to extend the remote control's lifespan. Zinc Alloy Button: The remote control uses zinc alloy buttons, which have a comfortable hand feel, and it is rust-resistant, strong, and durable. Remote Control: Remote control unlocking, the remote control needs to be paired with the system, suitable for some remote-controlled locks, for the 908 909 910 920 series. Convenient to Use: Remote control unlocking outside the door, low power consumption, free from the trouble of finding keys, bringing more convenience to your life. Specification Item Type: Door Lock Remote Control Material: ABS, Zinc Alloy Application: Suitable for some remote-controlled locks, 908 909 910 920 series Frequency: 433MHz (rolling code) Size: Approx. 60x30x12mm / 2.36x1.18x0.47in Battery Type: CR2025 button battery 150mAh x 1 (built-in) Package List 1 x Door Lock Remote Control 1 x Keychain