Features: If the battery is powerless when the padlock is off, use the new lithium battery, insert the emergency socket, and then enter the key password. Made of 98% aviation zinc alloy, robot welding technology and 304 stainless steel lock beam. Supporting for iOS and Android: Mobile phone system, fully supporting over 99% of the mainstream brands in the market to quickly match mobile phones and padlocks. No need for key to unlock, lock record can be checked at any time. Use CC2540 chip with superior performance greatly reduces battery power consumption and improves padlock performance. Three steps to open the padlock. Unlock padlock (display blue light), enter the 6 bit key password, immediately unlock if you input correctly . Input error shows red light and you should reinput again. Widely used in university dormitory cabinets, drawers, suitcases, warehouse color stores. Specifications: Power Supply Mode: 80mAh Lithium Battery (Included) Unlock Mode: Key Password, Intelligent APP Lock Core Level: Chip Lock Body: Zinc Alloy Lock Tongue: Brass Induction Time: <0.5s Driver Chip: IG Company Bluetooth Chip: TI Company Size: Approx. 3.6 x 5.8 x 2.0cm/1.4 x 2.3 x 0.8in Package Weight: 121g/4.3oz Package List: 1 x Bluetooth Padlock (Battery Included) 1 x User 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.