Features 1??Four unlocking mode: Remote control unlocking, Manual rotating unlocking, Indoor one-key unlocking, Mechanical emergency unlocking, more convenient to use, ensure your home security 2??Independent dual electronic drive system, imported dual motor, more reliable 3??Simple and convenient installation: equipped with installation accessories, very practical 4??Low voltage alarm: Remind you to change batteries 5??Power saving control mode, low power consumption, 4 * AA batteries (Not included) can offer about 1 year work Specification Features: Four unlocking mode: Remote control unlocking, Manual rotating unlocking, Indoor one-key unlocking, Mechanical emergency unlocking, more convenient to use, ensure your home security. Independent dual electronic drive system, imported dual motor, more reliable. Simple and convenient installation: equipped with installation accessories, very practical. Beautiful appearance and arc design, the lock body is relatively thin. Power saving control mode, low power consumption, 4 * AA batteries (Not included) can offer about 1 year work. An ideal equipment for home, offices, hotels, apartments, restaurants, dormitories and so on. Specification: Condition: Material: Zinc alloy Color: As Pictures Shown Four unlocking mode: Remote control unlocking, Manual rotating unlocking, Indoor one-key unlocking, Mechanical emergency unlocking Power supply: 4 * AA batteries (Not included) Battery service life: lasts for one year Installation method: screw / rivet installation, adhesive paper Remote control: 4 in this Package, max match up to 32pcs Remote control battery: 2032 large button battery Operating temperature: -20 ?? to 60 ?? Operating humidity: 5%-60% (no frost condition) Item Size: As Pictures Shown Package Weight: Approx. 900 g Package Include: 1 * Lock (Main Body and Lock Tongue) 1 * Antenna 4 * Remote Controller 4 * Bags of Screws and accessories 1 * Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.