ITEM NAME:4pcs 5V 2.4A Charging Board Mobile Charger Module Double USB Description: The dual USB charging Board is made of high quality metal, eco-friendly, durable and practical. This charger module is a portable backup power source, and its input corresponds to a 5.0 v adapter for charging the internal battery. The built-in battery of the handheld computer can provide 5.0 v / 3.0a usb2.0 output power for external devices. Safety protection: overload protection, over discharge protection, short circuit protection, constant current. The LED screen shows the current battery level, when use the charging board. Size Chart: Length: approx. 6.5cm / 2.56 inch Width: approx. 2.5cm / 0.98 Package Includes: 4 Pieces Dual USB Charging Boards Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you! SKU: DMO0021844873021615.The LED screen shows the current battery level, when use the charging board. 4 Pieces Dual USB Charging Boards. The built-in battery of the handheld computer can provide 5.0 v / 3.0a usb2.0 output power for external devices.