Features:Standard dimension of Raspberry Pi HAT, and it's for all of the expansion boardCascading design saves space while powering raspberry pi and expansion boards without affecting GPIO expansionSupport up to 2A quick-charge technology, can rapidly charge full the batteryCan be charged and supplied power to raspberry pi at the same timeWith 4 LED power indicatorProvides an example code to beginner to demonstrate how to demonstrate battery capacity displays the current battery level in the raspberry pi current program, it can detect the current battery, voltage etc.Removable battery, user can choose a more larger capacity lithium battery(NOTE: voltage must be 3.7V)With safety for protection circuit to prevent overcharge and over dischargeRetains the raspberry GPIO interface, you still can use all kinds of expansion boardApplicatoin scene 1: You can program to control automatic backup of data at low power and safe shutdown.Applicatoin scene 2: Remind users to charge at low battery levels. etc.)Notice: Don'for t connect the micro USB to rasberrry pi; please connect the micro USB to UPS HAT board Specifications:Maximum Output: 5V/2AMaximum Input: 5V/2ABattery Voltage: 3.7VBattery Capacity: 2500mAhMax. Charger Current: 2AMax. Output Current: 2ABoard Size: 6.5x5.5cm/2.56x2.17"Battery Size: 6x4cm/2.36x1.57"Quantity: 1 Set Note:Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bidDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackage Contents:1 x Raspi UPS HAT Board1 x Li-ion Battery(2500mAh)