Features: 1.Double Head Lock: The door needs to swipe a card or mechanical key to unlock, go out must swipe a card or mechanical key to unlock, high security. 2.Silent Unlocking: The battery lock uses a silent motor, and the operation of unlocking the lock is quieter and noiseless, won't disturb family or neighbors. 3.Wiring Free Design: The lock needs simple installation, no wiring trouble, with mounting screw package, fast installation, no professional technology is required. 4.Anti Theft Function: Swiping ID card and battery wiring is a integrated design, enhance security, protect your property safety, with a high anti theft performance. 5.Wide Range of Applications: Wiring free lock can be installed to home, can be opened in two ways, by swiping a card or using a key,very convenient. Specification: Item Type: ID Card Lock_x000D_ Material: Stainless Steel_x000D_ Product Size: Approx. 13 x 10 x 4cm / 5.1 x 3.9 x 1.6in _x000D_ Battery Specification: Button Battery_x000D_ Battery Model: Cr2025l_x000D_ Battery Capacity: 140mah_x000D_ Lock Battery Type: AA Alkaline Dry Battery (Shipped Without Battery)_x000D_ Lock Battery Model: Aa_x000D_ Number of Lock Batteries: 4 PackageList: 3 x Lock Body 1 x Remote Control 1 x Intelligent Management Card 3 x Key 2 x Id Sensing Card 1 x Lock Core 1 x Screw Pack