Item Type: Battery Charger Outer Case Product Material: ABS, Metal Product Interface: Micro USB Interface Input Voltage and Current: 5V2A Output Voltage and Current: 5V1A, 5V2A Battery Information: 4 x 18650 Batteries (shipped without batteries) Product Size: Approx. 11.5 x 8.1 x 2.5cm / 4.5 x 3.2 x 1.0in 1Convenient and Practical: The power bank box has a screen to display the charging progress, and comes with LED lights for emergency lighting 2Protection Function: The 18650 power bank box supports protection functions such as overvoltage protection, overcurrent protection and short circuit protection 3Compact and Portable: The DIY power bank box has a compact and lightweight design, which is easy to carry and convenient for you to use anytime, anywhere 4ABS and Metal: The battery charger outer case is made of ABS and metal material, which is environmentally friendly, free of welding, and safe to use 5Scope of Application: The portable DIY power bank has a wide range of compatibility and is suitable for digital devices such as mobile phones and cameraswithout battery1 x BatteryChargerOuterCase