Features: forRaspberryPi uninterruptible power supply expansion board 5v2.5a mini power supply expansion board. On board batteryprotection circuit, preventing overcharging, discharging, overcurrent, short circuit, and reverse connection Balanced charging for stable and safer operation Mini UPS expansion board for easy welding or integration into car designand industrial control equipment Supports stable voltage output of 5V while charging and discharging; Onboardwarning indicator light Specifications: Output voltage 5V2.5A Charging voltage 5V3A Control interface 12C Battery specification 350mAh 10440 lithium batteryx3 (batteries do NOT included) Size: approx 61x38mm/2.4x1.5in Package Includes: 1PC Mobile Power Module note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you