Product Name:Emergency power supply for safe
Product material: PP
Battery box size: length 75mm/2.95in, width 65mm/2.5in, height 18mm/0.71in
Cable length: 200mm/7.87in
Battery pellet: 4 x 1.5V batteries
Quantity: 1pc

Interface Specification:
Type-c header : Same as some new smartphones
Micro-USB: the same interface with some Android phones commonly known as Android port
3.5mm hollow head: some safes use this interface
2.5mm: slightly smaller than the headphone jack
3.5mm: the same as some headphone jacks
Mini-USB: the same interface as some of the old cell phone interface is slightly larger than Micro-UsB

Usage:
First step, open the outer cover of the battery box
Step 2: Load 4 x 1.5V batteries, do not exceed 6V.
The third step, close the battery box to find suitable for their own safe socket
Step 4 Insert the battery box into the emergency power hole of the safe and energize it.