Check the listing for details. Master Lock 5440D 3-1/4-inch Wide Bluetooth Electronic knob Mount Lock Box. Condition: New. Listed at 270.25 USD. Product Description Style: Knob mount The Master Lock No. 5440D Safe Space \Bluetooth knob Mount Lock Box. Open and manage with your smartphone or with temporary or permanent codes. Monitor who visits and when through the APP and notifications. Easily installed using hardware supplied with the lock box. Large capacity to hold key cards or traditional keys. Long life battery is easily replaceable. Solid body durability and coated surface to protect hardware and door finish. Works with the free Master Lock Vault eLocks APP. Product information Style: Knob Mount Technical Details 5440D Item Weight 3 pounds Product Dimensions 5.2 x 2.5 x 8.4 inches Item model number 5440D Batteries 1 CR123A batteries required. (included) Style Portable Item Package Quantity 1 Certification Not Applicable Included Components Lock box Batteries Included? Yes Batteries Required? Yes Battery Cell Type Lithium Need additional spare batteries? We have them in stock. Additional Information Shipping Weight 7.5 lbs.International Shipping Yes, if needed